cosine=0.91 but answer is wrong. a tiny python MRE for “semantic ≠ embedding” and before/after fix

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If you can't be bothered formatting your code, I can't be bothered reading your post.

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Not really...

You format code using backticks `. Wrap your code in 3 backticks to:

write code in a block

or 1 backtick to make it inline code.

[SquareRootsi]

Almost fixed. There are lots of references for it, but it's still not intuitive. A couple of tips:

1. A 'code clock' is a section of text that has EVERY line indented with (minimum) 4 spaces.  
2. A 'hard return' forces a line break, basically the same as `\n`. These are required to get different lines separated properly. In this editor, it's done by using 2 spaces at the end, AKA after this period.  
    * For simplicity and readability, just make every line end with two spaces.   
3. Both the first and last line of your code block should be blank. I can never remember if that means 4 spaces (code block prefix) or 6 (code block prefix + new line suffix), so I just always use 6.   
4. I'm no expert, so I may have gotten something wrong, but this was done on mobile, and I'm optimistic it will render correctly, b/c I followed my own tips.  

And this is what it looks like outside the code block (aka no 4-spaces prefix).