Q:

Question put on hold for absolutely no reason

The question described below has been put on hold for reasons beyond my understanding.  Would someone please kindly explain why?   I would like to start discussion on this if possible:
https://stackoverflow.com/q/39667486
Title of the question:

Why does python use ** instead of ^ to represent exponentiation? 

Content of the question:

 Who this question is addressed to:  People who have significant background in theory of design and implementation of programming languages and therefore have very good intuition on why certain choices in design of programming languages may be favored over others. 
 why this question is not opinion based:  Because just like there is a good reason for why other features of language are structure the way they are. ( certain feature of language being based on fortran and c++ and therefore being largely very efficient) similarly this may perhaps be one of those things where efficiency is impacted.  or may be not at all.  but the question if being dismissed for completely wrong reasons.  Below is the question:
what consideration in internal representation made architect of the language to choose ** over ^?  or was it a pure having preference for certain kind of notation thing? 

A:

It has been put on hold because you are asking us to take a wild stab at why Guido van Rossum chose certain operators to have certain characters. 
Now we could come up with a wide range of reasons.  Perhaps even well-motivated ones.  Maybe we assume influences from other languages.  Maybe we can infer something from the author's background.  That's all moot if in the end he just lost his keys the very day he took this decision and just in anger decided to mash some keys on the keyboard to see what he would end up with. ( We all know that losing your keys can make you do crazy stuff).  
Even you yourself say "May be it was the language creator just choosing the symbol may be not."  In absence of this creator, we can only guess.  And that makes the question unfit for Stack Overflow.  
And even if eventually Guido would be so kind to hop on to the site and answer the question, I'd argue it's nothing more than trivia.  

A:

You have asked for what rule your question broke, what guideline it does not fit.  You do not accept that your question is opinion based even though all the answers will be, except in an extremely unlikely situation, guesses. 
So let's actually take a look at the help center, shall we? 
We'll start with the What topics can I ask about here?  page:

a specific programming problem, or 
a software algorithm, or 
software tools commonly used by programmers; and is 
a practical, answerable problem that is unique to software development

Your question is not a specific programming problem.  It is not about a software algorithm.  There's no software tool being asked about. 
As we have been trying to tell you, it is not an answerable problem that is unique to software development.  All the "answers" will be guesses, not answers. 
If this still does not back up what has been said here, allow me to add from the What types of questions should I avoid asking?  page:

inspire answers that explain “why” and “how”   
tend to have long, not short, answers   
have a constructive, fair, and impartial tone  
invite sharing experiences over opinions   
insist that opinion be backed up with facts and references   
are more than just mindless social fun

You're only asking for answers that explain why, so you do not run afoul of that point.  We don't know how long the answers would be, so hard to say there.  I wouldn't argue about your tone, personally. 
It's the next two points where issues arise.  The answers will be opinions of why it was chosen as it was, at least more than likely, and it is very safe to assume they will also not be backed up with facts and references.  These two points very clearly indicate that your question is opinion based.  Answers will not be backed up with facts, they will be guesses and opinions. 
Therefore, the question is off-topic on Stack Overflow.  That other questions managed to fly under the radar does not mean that your question is okay, it just means they hadn't been caught yet.