Loosely translated: It is the responsibility of the person being deceived to recognize the deception and play along for the benefit of the deceiver. Otherwise, they have contributed to the problem by "assuming" that the deceiver is being straightforward. People are not straightforward! Shucks. Never "assume" anything anyone says is true, or you make an "ass" out of "u" and "me".
I hate that stupid bromide. When "u" assume, "u" don't make an "ass" out of "me". "U" make an "ass" out of "u" and "u" only. It's only when I keep believing "u" after I should know better that I become an "ass".
Believing what someone says because you trust them to not say something they don't mean? NOT AN ASSUMPTION. Not the problem of the receiver - problem of the sender. If you're doing this DELIBERATELY that is YOUR problem.
Enablers, enablers, everywhere.