The Collaborative International Dictionary
Posit \Pos"it\, v. t. [imp. & p. p. Posited; p. pr. & vb. n. Positing.] [L. ponere, positum, to place. See Position.]
To dispose or set firmly or fixedly; to place or dispose in relation to other objects.
--Sir M. Hale.(Logic) To assume as real or conceded; as, to posit a principle.
--Sir W. Hamilton.
Wiktionary
vb. (present participle of posit English)
Usage examples of "positing".
By positing the point as the unit from which to start, and deriving our conception of the plane from the point, we constitute Euclidean space.
There are even antitheories positing error, mistaken identity, sick hoax.
We're now positing that Radovas and his equipment, with inside help, had been smuggled up to the soletta for whatever it was they were trying to do, rather than being aboard the ore freighter.