a priori involving deductive reasoning from a general principle to a necessary effect; not supported by fact; "an a priori judgment"
deductive involving inferences from general principles
logical capable of or reflecting the capability for correct and valid reasoning; "a logical mind"
logic reasoned and reasonable judgment; "it made a certain kind of logic"
analytic -
using or skilled in using analysis (i.e., separating a whole--intellectual or substantial--into its elemental parts or basic principles); "an analytic experiment"; "an analytic approach"; "a keenly analytic man"; "analytical reasoning"; "an analytical mind"
