Hey guys, I've been stuck on wenona's rebuttal showdown for 30 minutes.  How do you figure out the correct way to counter her argument by slicing the correct way? Please I need help.

For words that are Vertical you slash Horizontally vice versa for Horizontal words. For Diagonal words, slash whichever direction the orientation of the word is.

so if it's angled like this:  / 

 you press both up and left at the same time. As always you're looking for a gold word you can dispute when you find it make sure you have the correct evidence sword then press the button to draw your sword it will auto slash, if it's correct the rebuttal will end.

If you mean a general hint for the correct word to counter her argument: Show Wenona proof

Happy to assist more if this isn't enough.

It is possible that your computer is below minimum specifications and that is why the Rebuttal Showdown is not working. On the official Discord server there is a LowSpec build that should fix or at the very least attenuate this issue.