Can a judge make it case law that 2&#215;2=5? The following quote from Malcolm Turnbull is actually not what this question is about, but nevertheless it is a good-fit epigraph: The laws of mathematics are very commendable, but the only law that applies in Australia is the law of Australia. Though the scenario I give in this question is exaggerated, hypothetical, edge-case one, it is technically valid and showcases the essence of the question. A recent question/answer seems to be telling us that it is perfectly fine for a judge to reject an argument even implicitly — i.e. without actually discussing it. Such a judgment might only be vulnerable to appeal, but in no way to judicial discipline / misconduct investigation. If not successfully appealed, it becomes case law — binding on all inferior courts. Where rights of appeal do not exist (e.g. the court is the top court in its jurisdiction), the judgment becomes set-in-stone law — until cancelled either by the same court or via legislation. So, let's consider the same example as in that question, but more specific one: Bob contends: I am right and Rob is wrong because blablabla... 2×2=4 ...blablabla. Rob defends: No Bob is wrong, because blablabla... and 2×2 actually equals 5. Bob replies: But look, lets see what 2×2 equals to [math proof follows]. It is 4, you see. The judge says: I accept Rob's contention that Bob is wrong because 2×2=5. Bob has no case. So, the judge implicitly rejects the math proof that 2×2=4 (as their Honour "does not have to address every argument raised in their judgement") and, effectively, makes it case law that 2×2=5. Is this scenario technically/legally possible? Would the case law that 2×2=5 stand for some time? Will the judge not face any disciplinary consequences but just public outcry and reputation damages? I appreciate that one might want to say that no judge would accept such an extremely outrageous merit-lacking argument as "2×2=5" and I totally agree (with hope). But the way this question applies to reality is that there is no clear boundary between "2×2=5" and any mundane argument that Rob might argue — as far as its acceptance by a judge is concerned.
Appellate judges make holdings on matters of law, and generally defer to the fact-finder in a given case (the jury, or sometimes the judge) on factual matters relevant to a case. So in a case that involved certain mathematical arguments, they would generally leave it to the jury to decide whether those arguments were reliable. Put simply, Appeals courts don't make binding decisions on issues of fact, only issues of law.
In practice, common law courts turn to academic writing, either law review articles or legal treatises or the &quot;Restatements of Law&quot;, on a regular, but infrequent basis. These sources are not binding sources of legal authority but can shed persuasive light on the logic behind a legal rule or the course of action that has been taken in previous similar cases. In civil law countries (i.e. those not descended from the legal system of England), there are far fewer circumstances in which court precedents are sources of law. Much of the gap in credible sources for how ambiguities in the statutory law should be interpreted in these countries comes from academic writing. In a typical civil law country, a leading law professor has more impact on how the law is interpreted than senior appellate court judges. Again, academic writings are not binding legal authority, but in the absence of alternative sources for material interpreting statutes, they are very persuasive.
An appeal to ignorance asserts that a proposition is true because it has not yet been proven false. That is not in any way the situation here. The defendant knows if he/she has or has not so the only available answers under oath are "yes" or "no" - the jury knows this too so any other answer will be seen as disingenuous. However, this information (affirmative or negative) is off limits to the jury as it could prejudice their decision, hence the mistrial. A quick judge could instruct the defendant not to answer and instruct the jury to disregard the question but if a conviction results the defence team could use the fact that it was asked as grounds for appeal. A judge must decide if the interests of justice are better served by a retrial or a tainted conviction.
Judges do not decide, jurors do (however, if a judge is the fact-finder, then the judge makes such a determination). The main input that the decision-maker gets is a jury instruction. In order to unify "reasonable doubt", "reasonable price", "reasonable delay" and so on, appeal is often made a mythical being, "the reasonable man", so reasonable force would be the degree of force the reasonable man would use in a given situation. I will draw from California criminal instructions ('cuz I have them) but similar instructions can be found across jurisdictions. For example, one instructions says "A natural and probable consequence is one that a reasonable person would know is likely to happen if nothing unusual intervenes". Or from a negligence instruction "A reasonable person would have known that acting in that way would create such a risk". More detailed appeal to The Reasonable Person is found in the justified homicide instruction: Defendant’s belief must have been reasonable and (he/she) must have acted only because of that belief. The defendant is only entitled to use that amount of force that a reasonable person would believe is necessary in the same situation. If the defendant used more force than was reasonable, the [attempted] killing was not justified. When deciding whether the defendant’s beliefs were reasonable, consider all the circumstances as they were known to and appeared to the defendant and consider what a reasonable person in a similar situation with similar knowledge would have believed. If the defendant’s beliefs were reasonable, the danger does not need to have actually existed. The defendant’s belief that (he/she/ [or] someone else) was threatened may be reasonable even if (he/she) relied on information that was not true. However, the defendant must actually and reasonably have believed that the information was true. There is no explanation of what it means to be "a reasonable person". Since nobody believes that they themselves are unreasonable, a simple and also wrong way of judging the matter is to subjectively judge whether you yourself would do the same thing, if you were in that situation. Very often, instructions do not even bother to say what "reasonable" means, so (re interpreting expert testimony) "You may disregard any opinion that you find unbelievable, unreasonable, or unsupported by the evidence"; (re corpus delicti) "That other evidence may be slight and need only be enough to support a reasonable inference that a crime was committed"; "Also, before you may rely on circumstantial evidence to find the defendant guilty, you must be convinced that the only reasonable conclusion supported by the circumstantial evidence is that the defendant is guilty", "when considering circumstantial evidence, you must accept only reasonable conclusions and reject any that are unreasonable" The closest the law has come to articulating an objective characterization of "reasonableness" is in "reasonable doubt" instructions. One characterization is in People v. Feldman, 71 N.E. 2d 433. It is not a doubt based upon sympathy or a whim or prejudice or bias or a caprice, or a sentimentality, or upon a reluctance of a weak-kneed, timid, jellyfish of a juror who is seeking to avoid the performance of a disagreeable duty, namely, to convict another human being of the commission of a serious crime A somewhat improved characterization is the Calcrim instruction Proof beyond a reasonable doubt is proof that leaves you with an abiding conviction that the charge is true. The evidence need not eliminate all possible doubt because everything in life is open to some possible or imaginary doubt There is room for improvement, but it points in the right direction. On rare occasions, a law is written that actually includes a definition. The Gas Price Spike Act HR 3784 said The term ‘reasonable profit’ means the amount determined by the Reasonable Profits Board to be a reasonable profit on the sale. It is then up to the board to subjectively determine what that profit is. (BTW this did not become law). [Addendum] It's actually very difficult to determine what reasoning judges use in those cases where they are the determiners of fact. They will likely call on their knowledge of law, asking "are these circumstances sufficiently like past circumstance A where the defendant was convicted, or more like B where the defendant was acquitted".
If you say something twice, eventually they’ll be in conflict Law codes are vast. They deal with many things and sometimes, as here, they deal with the same thing twice. If they duplicated themselves, rather than cross-referencing, every time the law was changed, every single instance would have to be tracked down and changed. Admittedly, that is not as big a problem with digital codes (but still not infallible and definitely time-consuming) but when these would have to be found by hand, it was damn near impossible. Written this way, change it once and it’s changed everywhere. My first boss taught me that. The fired was engineering rather than law but the principle is the same.
Yes. This is legal. See, e.g. SPARF v.U.S. 156 U.S. 51 (1895); U.S. vs Moylan, 417 F 2d 1002, 1006 (4th Cir. 1969); U.S. v. Krzyske, 836 F.2d 1013 (6th Cir. 1988) (&quot;the jury asked the judge about jury nullification. The judge responded, &quot;There is no such thing as valid jury nullification.&quot; The jury convicted the defendant. On appeal, the majority and the dissent agreed that the trial judge's instruction was untrue, but the majority held that this false representation was not a reversible error.&quot;). Indeed, procedurally, the system is specifically designed to prevent courts from even considering such a question. See also, e.g. People v. Iannicelli, 2019 CO 80, § 2 (Colo. 2019) (holding no crime was committed) (&quot;Defendants Mark Iannicelli and Eric Brandt stood in the plaza square adjacent to the Lindsey-Flanigan Courthouse in Denver and asked people entering the courthouse whether they were reporting for jury duty. If any of these people answered affirmatively, then Iannicelli and Brandt would hand them one or more brochures discussing the concept of jury nullification, which the brochures defined as the process by which a jury in a criminal case acquits the defendant regardless of whether he or she has broken the law in question. As a result of this conduct, the People charged Iannicelli and Brandt with multiple counts of jury tampering&quot;) This is deeply entwined with the U.S. law interpretation of the Fifth Amendment Double Jeopardy Clause's protections, which prohibit a retrial or appeal following a judgment of acquittal, which have been incorporated by the U.S. Supreme Court as applicable in state courts as well.
You have to deconstruct the question on a country by country basis. In the US legal system, the question presupposes something incorrect, that there are &quot;investigators&quot; who play a rule in legal system, and their job is to determine guilt vs. innocence. That is something determined by the &quot;finder of fact&quot;, typically the jury (it could be a judge, when you have a bench trial). The finder of fact may take into consideration testimony provided by a witness, and it is possible that a witness is an expert in some relevant area, who might attest to the significance of a claimed piece of evidence. The expert cannot testify on the question of guilt. For example, a DNA sample might be admitted as evidence that the defendant was present in certain circumstances, which could reasonably lead the finders of fact to conclude that the defendant did strike the victim. A DNA sample cannot testify, therefore some expert must testify about the significance of the sample, specifically whether the sample &quot;might have&quot; come from the defendant, or &quot;definitely came from&quot; the defendant. Others will testify as to the circumstances surrounding the collection of the sample. It is then up to the finder of fact to evaluate all of the evidence plus understand the instructions regarding the criteria for finding the defendant &quot;guilty&quot;. Theoretically, Bayes Law could enter into an expert witness's (scientific) testimony, and likewise an opposing witness could contradict the putative relevance of BL in terms of reaching a scientific conclusion. BL could enter into the discussion at the level of the bottom line &quot;definitely/possibly does come from the defendent&quot;. The only practical way that I can see BL entering into the courtroom at least non-gratuitously would be if there is a dispute over the reliability of a certain test, thus should the testimony be allowed in the first place (it might be excluded as being unreliable). There is a genre of research (for example this) that addresses the problem of sketchy statistic inferences, pointing to a role for BL. I would say that the prospects are dim, not bright.
Courts have inherent jurisdiction to reconsider/recall their own decisions. This rarely happens (especially if the decision has already been &quot;sealed&quot; i.e. issued in writing) but still possible. The principle of finality only applies to parties asking courts to reconsider; it does not constrain courts themselves. So, in this example, &quot;the judge agrees to vacate them&quot; but that decision hasn't been sealed yet. The judge can easily just change their mind (although, again, it rarely happens). No double jeopardy applies because it is still the same trial.