Board Thread:Arrow discussions/@comment-30695955-20170107074809/@comment-30695955-20170110005038

Definition of "theory": a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained

Note: Notice the OR in there.

Definition of "supposition": an uncertain belief.

Therefore an a supposition is an uncertain belief, and a theory is a supposition, ergo a theory is an uncertain belief.

Anyways, it doesn't show him on screen during then. You can only speculate that he remained in the Arrowcave the entire time.