To posit something is to assume or suggest that it is true. You can posit an idea or opinion.

When you posit, you submit an idea or give an opinion. Scientists posit many ideas — called hypotheses — that they then try to prove or disprove through experimentation and research. In science, you hear about positing a lot, and the same is true in math and logic. When you say "If X, then Y" you're positing a proposition. Positing can also mean to put something somewhere firmly — this means to deposit, fix, or situate.

Definitions of posit

v take as a given; assume as a postulate or axiom

“He posited three basic laws of nature”
assert, insist
assert to be true
Type of:
presuppose, suppose
take for granted or as a given; suppose beforehand

v put before

put forward, state, submit
Type of:
advise, propose, suggest
make a proposal, declare a plan for something

v put (something somewhere) firmly

“She posited her hand on his shoulder”
deposit, fix, situate
place in the earth and cover with soil
deposit as a sediment
Type of:
lay, place, pose, position, put, set
put into a certain place or abstract location

n (logic) a proposition that is accepted as true in order to provide a basis for logical reasoning

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Bayes' postulate
(statistics) the difficulty of applying Bayes' theorem is that the probabilities of the different causes are seldom known, in which case it may be postulated that they are all equal (sometimes known as postulating the equidistribution of ignorance)
assumption, premise, premiss
a statement that is assumed to be true and from which a conclusion can be drawn
major premise, major premiss
the premise of a syllogism that contains the major term (which is the predicate of the conclusion)
minor premise, minor premiss, subsumption
the premise of a syllogism that contains the minor term (which is the subject of the conclusion)
an unproved statement put forward as a premise in an argument
condition, precondition, stipulation
an assumption on which rests the validity or effect of something else
a postulated sequence of possible events
Type of:
(logic) a statement that affirms or denies something and is either true or false

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