The sentence,
Maybe, maybe not
relates to the question,
Is there any action that won’t trigger spite from this type of person?
from the poster above.
The phrase,
I know for a fact
refers to the phrase,
this type of communication
that being,
The dude 6" off your bumper is not going to hear “petro-masculinity” and have a quiet contemplative moment about carbon emissions and road safety. He’s going to feel scolded, hear that you’re triggered and frightened of his masculinity, and then he’s going to start driving even more aggressively out of spite.
which, of course, is a strict subset of "any action". It is therefore entirely possible to have certain knowledge of one without certain knowledge of the other.
Maybe you should learn how to read full sentences before you ask people if they think before writing?