How do you prove a fact at issue in litigation? Many questions on this site ask some variant of the question: &quot;how does one prove something in court?&quot; Paraphrasing a few: How do you prove that someone forged your signature? How do you prove that you didn't misuse a product? How do you prove money went missing? How do you prove somebody accepted an EULA? How do you prove that you owned an object before a certain date? How do you prove ownership of a pseudonym? Generally, how do you prove a fact in issue in litigation?
Special regimes For some kinds of questions there are special presumptions or forms of evidence that are specified by statute. For example, in Canada and the United States, registering a copyright creates presumptive proof that the copyright exists and is owned by the registrant. In Canada, breathalyzer results are conclusive proof of the blood alcohol concentration if certain conditions are met. Some of these regimes are not subject to challenge: they are legal facts even if they are not objectively true (e.g. the breathalyser results). Others create presumptions that can be overcome by contrary evidence (e.g. copyright ownership). The default: present relevant evidence, including testimonial evidence But outside of special regimes, you prove a fact by introducing evidence. The default is that all relevant evidence that bears on a material fact is admissible. Evidence is relevant when, if is were to be accepted, it would make the fact in issue more or less likely to be true. Evidence comes in many forms: testimony of the parties or witnesses, documentary evidence, physical evidence, expert opinion evidence. If you are wondering, &quot;How do I prove X?&quot; Ask yourself, why do you believe X? Or, how do you know X? Or, how has the event X left its mark on the world? Whatever has led you to believe X probably is the evidence that you would want to introduce to the court to help prove X. Perhaps you saw X: you can tell the court you saw X. Perhaps you took a photo of X: you can present that photo in court. Perhaps you have a receipt for X: you can show that receipt in court. Perhaps X is a proposition about your own actions: you can tell the court about those. Obtaining the evidence Evidence can be obtained from the other party during the discovery process, or from third-parties using subpoenas, subject to objections relating to relevance or privilege. Not all (potentially) relevant evidence is admissible However, some evidence will be inadmissible despite it being potentially relevant. I will only present a few categories, some very general and some more specific: hearsay (unless it falls within an exception to the hearsay exclusion), privileged material (unless it is a case-by-case privilege or a discretionary privilege and the person seeking to admit the evidence demonstrates to the judge that it should be admitted), sexual history evidence of a sexual assault complainant when it will be used to support an inference that the complainant is more likely to have consented to the sexual activity that forms the subject-matter of the charge or is less worthy of belief (this is because it has been recognized as not relevant for this purpose), material that was obtained in contravention of the Charter and where the court has decided that the remedy for the Charter violation is exclusion of the evidence (in the United States, there is stricter, exclusionary rule), there are many more. There are also some meta-rules about the evidence that may be used to impugn a witness's credibility, themselves at trial to provide evidence, but for now I am leaving those out of this fairly summary answer. Weighing the evidence The trier of fact (the judge or a jury) then is to weigh all the admissible evidence, including by weighing the witness and party testimony according to its credibility and reliability after testing through cross-examination, to come to a conclusion on the ultimate question(s) at issue.
How exactly would the court determine this to be the cause of divorce? 99.99% of the time, this would be purely a &quot;he said she said&quot; situation, for how can someone prove refusal to engage? You can prove the opposite if there are children born to both parents, but how can one prove a negative? Or is the statement by the divorce initiator considered sufficient for the judge? Testimony under oath is evidence. Judges resolve &quot;he said she said&quot; situations every day on a routine basis with witness testimony alone by judging the credibility of each witness before them. See also an answer by @Jen about the subject of how things are proved in court in general. In the appropriate case, testimony under oath with no other corroborating evidence can even support a murder conviction as proof beyond a reasonable doubt. It can certainly suffice to prove marital fault in a civil lawsuit for a divorce. If the judge finds that witness testimony under oath between more than one witness is irreconcilably different, and each witness is equally credible, and that it is impossible to tell which person is telling the truth, then the person seeking relief from the court has failed to meet their burden of proof to obtain relief from the court. But, this is rare. Usually, when witnesses are both testifying under oath and disagree about what happened, the judge will find that one witness is more credible than the other. And, in truth, while people certainly do lie in open court under oath, and probably are more likely to lie in that situation than when speaking to someone not under oath outside of a courtroom, most of the time, people don't lie and the testimony of all of the witnesses are consistent with each other subject to limitations based upon what they could perceive from their perspective and the limitations of imperfect memories. This could come down to demeanor in court, hesitation in answering, &quot;tells&quot;, inconsistencies in their testimony, corroboration from other evidence and other witnesses (e.g. what someone said to a friend or wrote in a diary at the time), evidence that a witness has been convicted of a crime of deceit in the past, use of language that suggests coaching about their testimony, or common sense judgments about whose story seems more plausible under the circumstances of the parties in front of the judge.
&quot;become yours&quot; - Which court are you in? The court of the schoolyard? If you're in real court, then You would need to sue, to quiet title When a bona-fide dispute as to ownership exists, a case can be brought before a judge to resolve ownership definitively. The axiom of a quiet title action is that you must notify all parties who could possibly have an interest. Really, notification is 7/8 of it, because by the time you arrive at a &quot;quiet title&quot; action, most likely they either lost interest or are gone. And the crux of &quot;Notify&quot; is that your efforts to notify the party are to the standards of the court. You are a hostile party, noting your interests are in conflict with theirs. (we must fairly assume they want their iPad back; you want to take the iPad). Thus, it is obvious you will prefer to fail in your efforts at contact, and you will do a bad job of it, possibly on purpose. Since parties in a lawsuit are responsible to serve all documents on each other, courts have very high standards for that. And these standards are tested and gamed all the time. I even had a clever plaintiff do it to me! (we were expecting both the appeal and the dis-service). The crux of document service is you hire a licensed, third-party independent process server. A process server is naturally good at skip-tracing (think &quot;Dog: the Process Server&quot;) and is accustomed to finding people who are actively hiding. (because some people think they can avoid consequences by evading service. That's a loser's game generally.) So, when you show up in court and they aren't there, the judge will ask &quot;did you serve them?&quot; And then you say &quot;yes&quot;, name the company, and if needed call the process server to the stand, and the server reads out of their notebook all the things they did to search for the counterparty.
A case for negligence or some other tort would likely never reach the stage where we could answer this question, as lawyers are generally immune from suit for their litigation conduct. I don't know of any case with facts likey you've described, but my understanding is that the litigation privilege precludes virtually any tort action based on a lawyer's statements in the course of the proceedings. Florida's Fifth District Court of Appeal, for instance, has specifically acknowledged that claims for defamation, extortion, fraud, perjury, forgery, slander of title, injurious falsehood are unavailable: The policy reasons for the privilege have often been repeated: In fulfilling their obligations to their client[s] and to the court, it is essential that lawyers, subject only to control by the trial court and the bar, should be free to act on their own best judgment in prosecuting or defending a lawsuit without fear of later having to defend a civil action for defamation for something said or written during the litigation. Ponzoli &amp; Wassenberg, P.A. v. Zuckerman, 545 So. 2d 309 (Fla. 3d DCA 1989).
The user can always claim that. Whether such a claim will be believed is another matter. A party to a contract with a &quot;wet-ink&quot; signature can claim that it was forged or that the signer was impersonated. But such claims are hard to prove, particularly if they are not true. The answer to the question in the title is that terms are binding if the user freely agrees to them, and if they meet the conditions for a legally binding agreement in the relevant jurisdiction. The question in the body is more about what evidence will establish this. Suppose the code behind a web-site is so designed that no user is allowed to proceed without affirmatively accepting the ToS, and the operator can demonstrate this. That will be persuasive evidence that the user did accept the terms. If the site logs the consent in a database along with a timestamp that would be further evidence. A journaling database provides an audit trail of changes, which would be further evidence. Evidence of other users that the site always worked that way, and of coders that the code had never permitted a user to proceed without accepting the ToS might also help. Backups of the DB stored with a 3rd party including the consent logs would also provide evidence that the timestamps were present and unchanged. A hash of the log can be stored on the blockchain. The site could also send a &quot;registration accepted&quot; email to the user (if the user has provided an email address) which could include a mention that the user had accepted the ToS. Such an email would be reserved in the logs of the senders and receiver's email providers, and could be retrieved as evidence. Ultimately it will be a question of what the finder of fact believes, if the matter goes to court. And as user Amon says, the US standard is preponderance of the evidence (that is, the evidence is at least a little bit stronger on one side. This is sometimes loosely expressed as more than 50% or 51% or better proved, but courts do not in fact measure degrees of proof in numbers), not absolute proof.
Short Answer Is there any realistic situation where a court decision might hinge on producing the original physical paper certificate? Yes. But there are alternative options to prove the same thing, even then. A copyright registration certificate is not like a dollar bill or an original promissory note, where a copy isn't as good as the original, even though it can be slightly convenient to have the original in hand. Or are they just souvenirs that I can safely shred? If you scan them and then shred them, nothing horrible will happen. In the rare worst case scenario where the fact of your registration is disputed by a stubborn defendant in a copyright infringement lawsuit all of the way up to trial, you could get a replacement certified copy from the Copyright Registrar, or you could prove your registration with other evidence. Long Answer Registration is not required for a copyright to come into being in U.S. law. 17 U.S.C. §§ 102(a) and 408(a). But it is a condition precedent (i.e. a requirement that must be met prior to taking action) to certain legal remedies. 17 U.S.C. § 412. So, proving your registration is usually one element of your infringement claim in a typical copyright infringement lawsuit. In that lawsuit, if you actually go to trial, you need to prove that the copyright was registered in a timely fashion, if the other side won't stipulate to that fact. But it would be rare for a defendant who had been presented with a copy to insist that the fact of registration be proven at trial because being that stubborn is likely to piss off the judge unless they can successfully prove that you have faked your claim to have a registered copyright, which is something that almost no intelligent lawyer in a copyright infringement lawsuit wants to do, since judges have broad discretion on so many issues, even in a jury trial. The easiest way to prove the fact that your copyright was registered on a particular date is to offer up a certified government document like the ones that you have in your office into evidence as an exhibit (typically, one of your very first exhibits in your infringement case). This is because an official government certificate is exempt from the hearsay rule, is &quot;self-authenticating&quot; ,and its contents are admissible if not barred by another rule of evidence (which it almost never would be). The legal reason for keeping these paper documents is to get that evidentiary benefit at trial. See Federal Rules of Evidence 803(8) (exceptions to the hearsay rule), 902 (self-authentication) and 1005 (admissibility of public records). Of course, mostly, these fancy certificates are issued as a matter of pride and ego and customer satisfaction. Prior to an actual trial or evidentiary hearing in a copyright infringement lawsuit, a copy, supported by your declaration under penalty of perjury that the copy isn't a fake, would be the usual way to establish your registration in documents that are e-filed through the federal electronic e-filing service called CM/ECF rather than presented in person on paper anyway. Typically, pretrial document disclosure is done via an electronic transmission of scanned copies as well. In practice, it would be quite rare for a defendant in a copyright infringement lawsuit to insist that you prove up your registration at trial, rather than just stipulating to it. Indeed, it is you who might not want to stipulate in a jury trial, just so you can flash an important looking document in front of the jurors right at the start of the trial for dramatic effect. But you don't have to do that. Ultimately, if the defendant really did insist on proof of your registration, you could get a new certified copy from the Copyright Registrar (which wouldn't be quite as pretty, but would have the same legal effect) for a small fee without too much advanced notice, or you could introduce your scanned copy into evidence and authenticate it through, for example, your testimony on the stand under oath that you scanned the original and that it is a true and correct copy of the original. You also might want to keep a paper copy because it will still be around if all of the relevant electronic records are destroyed or inaccessible for some reason. But if that happens, copyright infringement may be the least of your worries.
Admission of copying proves one of the elements that the plaintiffs would normally need to prove in an infringement suit, making a law suit less risky from their perspective. This may very well invite lawsuits that would otherwise not be filed. But, this is pure speculation. Your legal rights are the same, independent of how much you choose to reveal in advance of a lawsuit. If your copying doesn't amount to a substantial taking, then it isn't infringement, whether you admit to copying or not.
This Question Is Tricker Than It Seems One of the things about being a non-expert in a field is that it is very difficult to know in advance what is a hard question and what is an easy question. Some questions that seem like they should have simple, straight forward answers are actually very hard to answer. Some questions that seem like they should be very difficult and have involved tricky answers are actually very easy. Without an in depth understanding of the field, you just can't know in advance. It turns out that this particular question is a quite hard question to answer. So, rather than really providing a clear answer, I will explain what about this question makes it hard to answer in this answer. Even this incomplete and ultimately inconclusive answer will require far, far more words (2,078 to be exact), than were necessary to pose the question (94 words). Essentially, the core difficulty is that there are several different principles of law that apply to this fact pattern, each of which, individually have specific things that have to be proved to establish that some legal consequence will follow (which in turn are often themselves intrinsically indefinite), and each of which has exceptions that could also be proved if specific things happen. In part, this is because, while the fact pattern set forth is not freakishly unforeseeable, it is also not a fact pattern that was contemplated when any of the individual legal principles that are implicated were conceived. Likewise, the interaction of these different legal principles in one fact pattern wasn't contemplated and there is probably no one clear controlling case precedent on point that involved this fact pattern. What the law does in cases like these (which come up all the time in real life) is to break down each legal theory individually and analyze it, possibly spread over multiple distinct court cases in different courts in front of different judges. I'll try to unpack the issues (dispensing with U.K. legal terminology in some cases, since I'm only trying to provide a sense of why this is complicated and not to provide a definitive answer to how it is resolved under U.K. law). Possible Claims, Charges, and Defenses; Traffic, Civil, and Criminal It is a crime to threaten someone with weapon or in another way that puts someone at risk of imminent harm. Depending upon the weapon and other circumstances, mere possession of the weapon might be a crime in the U.K. Someone who has been threatened with weapon or in another way that puts them at risk of imminent harm can be a civil lawsuit for money damages against the person making the threat which was called &quot;assault&quot; in historical common law. Someone who has been threatened by another can seek a restraining order/protective order directing that person to stay away from them in the courts in a civil action. Hitting someone else's car is a traffic violation, unless a defense to the traffic violation is present and proven. Hitting someone else's car with a statutorily mandated level of intent is a crime, unless a justification for the crime is present and proven. The person whose car was hit could credibly argue that hitting the door was a mistake, not because the door was hit, but because the driver intended to kill them and missed, so an attempted homicide charge could raised in a criminal proceeding. The person whose car was hit could argue that there was an intend to put them in imminent risk of harm providing a basis for a civil lawsuit for money damages for common law assault. Someone whose car is hit by another car through negligence or recklessly or intentionally can bring one or more claims in a civil lawsuit against the person who car hit their car for money damages. The standard of care for negligence is established by how a reasonable person would act under the circumstances. Self-defense is a possible defense to traffic offenses, criminal charges and civil liability related to harming another's property if the conditions for self-defense apply, which include a risk of imminent harm to oneself, another, or one's property, and if the action taken in self-defense is reasonably proportional under the circumstances as evaluated by a reasonable person in response to the threat. But, if the response of the person making the threat with the weapon was as a result of actions in which the person threatened with the weapon was the true aggressor, then the privilege of self-defense would be forfeited. In real life, good attorneys for the parties could almost certainly solicit and call attention to additional facts not mentioned in the question that would further muddy the waters and raise additional claims, charges, and defenses to claims beyond the ten listed above. I could analyze each of these issues on the facts in depth as best I could with references to statutes and case law (under a body of law other than U.K. law anyway), which would take a few lengthy and heavily researched paragraphs each that would take a fair amount of time each to prepare, but I won't. A full analysis would help you weigh the odds a little better, and if I was a lawyer of a party in this situation, I would do that since every little edge counts in litigation and negotiations of settlements. But even if I did that, it would still leave a lot of uncertainty regarding the final resolution of these questions on the merits. Decision-Making Regarding Bringing Claims The traffic and criminal charges would be brought or not brought largely in the discretion of the Crown attorney or some other government official. It is most likely that a government official making that decision is doing so because the offense was referred to them by the police officer who responded to the scene, or a police officer who received an informal complaint (as opposed to a civil court filing) from one of the parties, or through a complaint delivered directly to the prosecuting authority by an alleged victim. A prosecutor doesn't have to bring claims just because someone asks them to, and doesn't have to bring all possible claims even if some are pursued. The parties themselves would decide whether or not to bring civil claims against each other. Whoever is sued first would make the decision in the context of knowing that they will be a party to a civil lawsuit whether or not they bring civil claims of their own. Possible Forums The traffic offense would probably be resolved in one court. The criminal charges against the person making the threats would be resolved in another court. The criminal charges against the person who hit the car door would be resolved probably in the same court but in a different case, possibly with a different judge. The civil claims would be resolved in yet another court, probably with a different judge, although probably in a single case with the first person to make it to court as the Plaintiff and the other party as a Defendant bringing counterclaims against the Plaintiff. The civil claims might also involve other parties (e.g. the owner of the vehicles in question if not identical to the persons driving the cars at the time of the incidents). Issue Preclusion Some final decisions on the merits in some cases would resolve the outcome of other cases as a matter of law, other final determinations in some cases would not be binding on the other cases as a matter of law because burdens of proof are different, or the legal issue evaluated is not identical, or because other rules (like a rule against a traffic court decision resulting in a binding determination on civil liability for negligence) would apply. The exact rules are rather arcane and there are quite a few permutations of how it come up, but it is important to be aware that these kinds of rules are out there, exist, and would have to be analyzed by the parties as a matter of litigation tactics. Even The &quot;Legal Issues&quot; Are Fact Intensive Inquiries Almost all of the legal theories implicated above involve broad legal standards in which a lot of the substantive question of what is or is not legal is delegated to the finder of fact in a manner that cannot be reviewed on appeal. For example, in a negligence case related to damage to an automobile, even if there is a videotape and there is 100% agreement on precisely what happened, whether that conduct constitutes &quot;negligence&quot; that breaches the duty of care owed by a reasonable person to the general public to protect them from harm, is legally considered a &quot;question of fact&quot; to be determined by a judge on a case by case basis, rather than a &quot;question of law&quot; which will always have the same outcome and is subject to review by an appellate court if the judge gets it wrong. A similar &quot;reasonable person&quot; standard which must be resolved with a highly fact intensive inquiry that could be resolved more than one way by two different judges or juries hearing precisely the same facts and finding the same witnesses and evidence to be credible in exactly the same way, with both upheld on appeal, applies to the self-defense legal theory. This self-defense issue could also conceivably, based upon the order in which cases were tried and their resolution, be resolved one way in a criminal case and a different way in a civil case between the parties. In the same vein, when a threat is imminent is a highly subjective determination that could be resolved in a &quot;legally correct&quot; way that is not subject to being overturned on appeal on precisely the same facts, with precisely the same determinations as to credibility and weight of the evidence, by two different judges or juries. Again, the substantive question of whether particular conduct is or is not illegal is a &quot;question of fact&quot; that can't be resolved in the absence of a trial on the merits in a particular case before a particular finder of fact. Bottom Line The facts provided in the question aren't sufficiently detailed to provide a definitely correct answer to this question. Indeed, the nature of the facts is such that even an perfectly detailed factual statement regarding what happened might not be enough to definitively determine who has civil liability to whom, and to determine what charges each defendant is guilty of. Different judges and jurors could reasonably come to different legally correct conclusions in a case like this one when faced with precisely the same facts and resolving all issues of credibility and the weight of the evidence in precisely the same way. This difficulty is compounded by the fact that the same facts would be analyzed with respect to different legal theory analysis in different forums by different people, when there is not, as a general rule (although there is in some cases) any mechanism for compelling those decisions to be made consistently on outcome determinative evaluations of the same facts regarding what was reasonable for the parties to do under the circumstances. The notion that a judge is just an umpire, and that every competent judge acting in good faith will always resolve a case presenting the same facts in the same way is a myth. This simply isn't true, even in the U.K. where the judiciary is (as a consequence of how the system for appointment and retention of judges is designed) not nearly as partisan and politicized as it is in the United States. The outcomes of even fairly simple cases in many cases, like the one in this question, are intrinsically and irreducibly uncertain in common law legal systems. The range of possible outcomes from a best case scenario to a worst case scenario, for each party in this fact pattern, is very wide. A desire to tame the myriad uncertainties involved for all parties, and the desire to avoid multiple time consuming and uncertain court proceedings arising out of the same incident, is one of the reasons that it is very common for civil lawsuits to settle out of court without a trial, and for criminal cases to be resolved by an agreement of the prosecution and the defense (sometimes reached even before charges are filed).