There's a cheat button if you're stuck. It was behind a setting in v0.11, but v0.12 made it always visible.
124 days ago(+1)
So... On Android, when the virtual keyboard comes up, it does hide the cheat button and effectively disable it.
124 days ago (+2)
Huh... didn't think of that. I managed to get it to show by just closing the keyboard (and during the dialogue after you answer incorrectly), but that's not ideal. I'll see what I can do for next patch.