(quote from RealReality.org/Real_Faith_and_Reason_Vol_2_-_Scientia.pdf)

Just to clarify, in case there’s confusion about the word “presupposition,” here’s the Google definition:

a thing tacitly assumed beforehand at the beginning of a line of argument or course of action.

synonyms: presumption, assumption, preconception, supposition, hypothesis, surmise, thesis, theory, premise, belief, postulation

“Tacitly” means implied, unvoiced, or unspoken. Therefore, if we assume it tacitly beforehand, we hide the assumption and don’t openly talk about it. We treat it as if it were true when we haven’t seen conclusive proof. That makes it extremely deceptive. Those who want to manipulate us introduce these presuppositions using assumptive language. Assumptive language hypnotically makes the presuppositions seem real.

(end quote)