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I'm not sure what you're saying. B to F is not a fifth. A fifth up from B is F#.

Huh, I copypasted that from wikipedia but botched the text when trying to highlight the part where sharps start and left it half-written.

I'll just link the relevant wikipedia article:

B to F is a fifth; that interval is called a diminished fifth (one semitone less than a perfect fifth like B to F#).

Yes, this is true, but it's not how the circle of fifths works (which is what the comment I was responding to seemed to be alluding to).

He's right though, that's not what I was trying to write (not a 3:2 ratio).