analyze
apply reason
conjecture
deduce
doctrinize
entertain a theory
espouse a theory
generalize
guess
have a theory
hypothesize
infer
intellectualize
logicalize
logicize
philosophize
provide a rationale
rationalize
reason
speculate
submit
syllogize
synthesize
use reason
theorized
theorizes
theorizing
experimenter
ontologist
pragmatists
relativist
shillelagh
tinderbox