hypothesizing , also: hypothesising BrE

Instead, the exceptional cognitive abilities of memory and perception are the foundations for supra-logical hypothesizing.

The heliocentric theory had been around for thousands of years, and even Copernicus's monumental mathematical hypothesizing of it in 1543 remained of only academic interest.

In many ways, it's an exercise in post-hoc hypothesizing: what would have been the advantage, when the human species first evolved, for an individual who happened to have a mutation that led to, say, a smaller jaw, a bigger forehead, a better thumb?