You can't call black white and then say that to dispute that is to merely talk about definitions. "Acting as if one believes", if it means anything at all, must mean doing the same acts one would do if one believed. But you explicitly excluded betting on the outcome, a paradigmatic test of belief on LW.

Aiming at a target is not acting as if one were sure to hit the target. Visualising hitting the target is not acting as if one believes one will. These are different things, whatever they are called.