seeking adage

I'm pretty sure it was someone here who once mentioned the adage/law/maxim I'm trying to find. It was kind of a corollary to Hanlon's law ("never ascribe to malice what can be explained adequately by stupidity") -- it was along the lines of "before you decide to be offended, give someone the benefit of the doubt". I keep thinking cooperative principle, but that's Grice, and his maxims put the burden on the speaker (to be succinct, to be clear, to be coherent) and less on the listener.

Anyone have any ideas? Does this ring a bell for anyone?