Proverbially He who does this is lost

Let's check your Q rating--this word pluralized denotes sudden misgivings or questions

Heisenberg's 1927 indistinct principle? Irresolution? Hold on I got it! It was called this principle! That's it

If you cast a wary or cynical eye on things you may be a this like the ancient Greek philosophy adopted by Plato's school

Some folks unsure of a higher power are this word from the Greek for not known