τὰ ἀφανῆ τοῖς φανεροῖς τεκμαίρου → analyze the unknown based on the known
Interrogative: P. and V. πῶς; τίνα τρόπον; τίνι τρόπῳ; ποίῳ τρόπῳ; P. πῆ;
Indirect: P. and V. ὅπως, ὅπη, ὡς, ᾗ, ὅτῳ τρόπῳ.
how much or how great, interrog. adj.: P. and V. πόσος.
Indirect: P. and V. ὅσος, ὁπόσος.