Garak believes no such thing; in fact, he believes very little that is presented to him at any given time - truth is rarely one-sided, and very often easily adjusted to fit one's own perception of things.

"Ah." It is short, punctuated, perhaps even precise. One blink of an eye later, Garak has made up his mind. "If I can be of assistance in any way, please don't hesitate to ask."