A yet innominate mode of inference has become so frequent in certain quarters that the time has come to fashion a suitable name for it. The scheme of thought in question goes a bit like this:
If A, then B.
Not B.
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But A simply has to be ❢❢❢
I know some scholars will insist that it ought to be called “modus dolendo dolens” or something like that, but let’s not be pedantic.
Inquiry Into Inquiry 
Will modus dolens still be valid if A and B were not necessarily related?
Oh, there is nothing valid about this particular sillygism. It was meant as a joke, satirizing a manner of thinking that refuses to accept a logical conclusion. My pidgin Latin phrase “Modus Dolens” was intended to suggest “Way of Pain” or “Way of Sorrow”.
Isn’t this already called truthiness?
Not sure, maybe related, but this is more like information resistance.
Yes. Truthiness is placing one’s gut feeling above any regard for fact. Thus, information resistance based on a prior opinion or belief. Confirmation bias.