How do you say, "I don't know" in Discipline X

Performance poet and writer Hannah Chutzpah asked on Twitter:

What are the technical terms, in your field, for 'dunno'? In medicine there's 'ideopathic' [corrected the original, incorrect spelling] In archeology/anthropology there's 'ritual purposes' How do you professionally term 'we haven't got a clue'?

And the answers are a veritable riot!

As they say on Twitter, Thread.

And Fun.