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### Formatting Sandbox

Basically the same as Formatting Sandbox in Meta Stack Exchange, but since this and Statistical Analysis are the only two sites (I know) supporting $\TeX$ formatting, I believe we also need one here ...
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### Is this an answer only site for people who just started here?

I'm a new user. I don't understand why I can't tell users what is wrong with their work. You can only do that when you have reached reputation=50? I also don't understand anymore what is meant by ...
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### Should we really have a reputation requirement for commenting?

It's been my experience that this is damaging to the functionality of the site. Example. Say there are two answers to a question. The answerer pertaining to one of them misses something subtle but ...
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### Answers of the form “I don't have enough reputation to comment, but”

New users often want to make a comment about a question or answer that they have read on this site, but they lack the $50$ reputation necessary to leave a comment. To circumvent this, they post their ...
656 views

With my (terrible!) reputation of < 50 (new to the site), I cannot comment on posts and answers of others. However, if I wish to make an observation or give a hint as opposed to the full answer, ...
455 views

### Why can’t I participate in the discussion or contact the participants?

I found the following question and associated thread interesting, and I’d like to contribute: Product rule for matrix-valued functions and Differentiability of matrix multiplication. However, I have ...
133 views

### Why is it needed 50 reputation points in order to have the privilege to comment? [duplicate]

How do I make a comment? Well, this is easy, a user must have at least 50 reputation points, and comments are a privilege... wait, why is it? How to make a remark when reputation is under 50 ? One ...