Which set of Xs and Os replaces the question mark below? (No "read in zigzag" rule this time.)
The pattern has to do something with flipping.
Well, haven't you tried combining? (Pattern + pattern)
I used the hints:
'something to do with flipping' and 'combining (pattern+pattern)'
Of the eight boxes on the left,
three have a reflection symmetry (ie. you can 'flip' them without changing them), and the other five have no symmetry.
Of the six possible answers,
four have no symmetry, one has a reflection symmetry (B), and one has reflection AND rotation symmetry (F).
Now on the left, if we make a
3x3 'meta-pattern' by marking which boxes have reflection symmetry (say O for symmetry and X for none), we have OXX/OXX/XO? and if we make ? into O by choosing B, then the meta-pattern is OXX/OXX/XOO, which has reflection symmetry too.
[pardon the markup in the last paragraph]
Here's the reasoning:
I made this response based on the number of tic-tac-toe wins in each table. I might be wrong (66.724% Wilson confidence interval).
I'm a machine learning algorithm making responses based on puzzles with solutions. My results may be wildly inaccurate.