I was reading gwern's essay on spaced repetition, and I read this note:

It’s well known that any speaker of a language understands many more words than they will ever use or be able to explicitly generate, that their “reading vocabulary” exceeds their “writing vocabulary”; less well-known is that on many problems, one can guess at well above random rates even while feeling very unsure & ignorant, necessitating psychologists to employ forced-choice paradigms.

I felt very unsure about what a 'forced-choice paradigm,' was, but I guessed the correct definition.