I want to add new tags to some old questions.   Will the question will show up in Top Questions active as it has an updated answer?
What can cause a question to be "bumped" to the first page in the Active tab of a Stack Exchange site? (Changing the "Last Active" date.)  .
Is it now considered acceptable to follow a proper noun ... or any noun ... with a pronoun? E.g.      The President he issued a new executive order. What is a word that means "someone who pretends to be your friend but is actually your enemy?" What do you call someone who pretends to be your friend but is actually your enemy?  A friend suggested spy for me, but that does not nearly describe the word I need for an English project. The character is very good at manipulating how people see him. He's a good liar. And pretends to be your friend but actually is your enemy. "Baggage" versus "luggage" I have the feeling that luggage is more closely associated with vacation travel, whereas baggage is for general transportation.  Or... are they just exact synonyms? Adding new group layer with ArcPy? How do I format my code blocks? How do I post text so that it is formatted as code?  What do I need to do so that my code shows up properly &mdash; not escaped or removed &mdash; when posted? And how to get the correct syntax highlighting?     For more information, see "" in the . Where can I ask Android related questions in Stack Exchange? I would like to know where I can ask Android apps and other mobile related questions. Is there a Stack Exchange site for such questions? How to resume baking fluid simulation? It happens sometimes that after finishing bake (e.g., for fluid simulation) we wish we could continue the simulation for two more seconds :(    How to use the cached bake to continue the simulation?  We played with the settings, but with no success. GitHub pages are not updating This is something that has long bothered me, and I have asked a few physicists and chemists and never gotten a very satisfying answer. Why are particles charged? And I'm not asking (and this is the answer you often get) why some molecule might be negatively charged because the answer to that is simply is that there was one more negatively charged particle than positively charged particle. That doesn't answer my question, however, of why there are charged particles at all?  So, on a fundamental level, what makes one particle charged and another one neutral.  For instance, protons and neutrons have almost exactly the same mass, which I'm assuming that means they have very similar internal compositions, yet one is positively charged and the other neutral. What is going on that makes these particles different?  On a similar note, and I'd really like to know this, how is it that a proton and an electron have exactly equal and opposite charge, yet an electron is about 1000 times less massive than a proton?  I have particular trouble with this question because if the answer were something along the lines of "particle X which composes protons all have partial positive charges of n amount..." I would just ask why particle X has any charge and we'd be in the same predicament.  I'm sure there is a satisfactory answer to my question, I just can't find it and don't know what resources are reliable or detailed enough to be satisfactory. Applications Don't Show Up in Spotlight Spotlight has stopped showing any results for my Applications. I've tried reindexing and removing the index so it rebuilds it. No change. I've tried adding Applications to the Privacy tab and removing it, no change.  I tried repairing disk permissions and redoing the above, no change. I've tried removing everything from the index except Applications and then I just get nothing for any search at all (except dictionary entries).  I tried adding a symlink in my homedir to Applications and reindexing, but no change.  Any ideas on what to do?  I'm running Snow Leopard.  This is driving me crazy!  Update: I've noticed that when I start a reindex with sudo mdutil -E / and then immediately do a Spotlight search for an app that the app shows up temporarily until Spotlight gets disabled due to active indexing.  After the indexing is done, the app entries go away. What was the inspiration for the design of R2-D2? Looking at R2-D2, I can't think of any robots I've seen in science fiction that vaguely resemble R2D2's design.  What was the inspiration for the design of R2-D2? Union of subgroups is a subgroup if and only if one subgroup is a subset of the other Let $H$ and $K$ denote two subgroups of a group $G$.  Prove that the union $H \cup K$ is a subgroup of $G$ if and only if $H \subset K$ or $K \subset H$. Strategy for "Which is better" questions In questions that are asking:    "Which is better option A or option B?"  It seems that several close reasons immediately come to mind:   Primarily Opinion Based.  In many cases the choice between A and B is simply a personal preference, a "6 vs. half dozen", either approach will work just as well and answers to this type of question will be almost entirely opinion based. Too Broad.  In some cases A is better and in others B is better, to go through every possible use case would lead to too many possible answers or one answer that reads like a short text book. Off-topic, Minimal Understanding, include attempted solutions.  This is perhaps the the most important one. If the OP needs to know "Which is better", they should probably have tried both and decided which is better, based on a practical trial.   Yet another option would be to downvote and/or comment with a "Try it and find out".  So...  Are there cases when these questions are permissible?   Could we add some more specific guidance in the help center?  Or should we continue to handle these case by case and just downvote/close appropriately when they pop up?  Strongly related, but hopefully not a duplicate of:   "Which is faster" isn't the only case where these pop up. Quad tree vs Grid based collision detection Uniform convergence of $\sum (-1)^nf_n(x)$ on $[0,1]$ where $f_n(x)=x^n(1-x)$. Let $f_n(x) = x^n(1-x)$ and $\sum (-1)^nf_n(x)$.  I showed that this series point wise.  Case1) $x=1$ $$ f_n(1)=0 \, , \sum{(-1)^nf_n(1)} = 0 $$ Case2) $x\neq 1$ $$|f_n(x)| \leq |x|^n$$ since $$\sum |x|^n$$ converges, By abosultely convergese test $\sum (-1)f_n(x)$ converges.  I want to show that this series uniformly converges on $[0,1]$. What kind of questions can I expect to see on a qualifying exam? I have a SQL query that I am trying to optimize:  DECLARE @Id UNIQUEIDENTIFIER = 'cec094e5-b312-4b13-997a-c91a8c662962'  SELECT    Id,   MIN(SomeTimestamp),   MAX(SomeInt) FROM dbo.MyTable WHERE Id = @Id   AND SomeBit = 1 GROUP BY Id   MyTable has two indexes:  CREATE NONCLUSTERED INDEX IX_MyTable_SomeTimestamp_Includes ON dbo.MyTable (SomeTimestamp ASC) INCLUDE(Id, SomeInt)  CREATE NONCLUSTERED INDEX IX_MyTable_Id_SomeBit_Includes ON dbo.MyTable (Id, SomeBit) INCLUDE (TotallyUnrelatedTimestamp)   When I execute the query exactly as written above, SQL Server scans the first index, resulting in 189,703 logical reads and a 2-3 second duration.   When I inline the @Id variable and execute the query again, SQL Server seeks the second index, resulting in only 104 logical reads and a 0.001 second duration (basically instant).  I need the variable, but I want SQL to use the good plan. As a temporary solution I put an index hint on the query, and the query is basically instant. However, I try to stay away from index hints when possible. I usually assume that if the query optimizer is unable to do its job, then there is something I can do (or stop doing) to help it without explicitly telling it what to do.  So, why does SQL Server come up with a better plan when I inline the variable? Not every boolean function is constructed from $\wedge$ (and) and $\vee$ (or) Change .jpg quality of terminal screenshots Can't access pre populated SQLite database using PhoneGap/Cordova in Android