I stumbled upon the English term Truthiness
"truth" that a person claims to know intuitively "from the gut" in that it "feels right" without regard to evidence, logic, intellectual examination, or facts
I like this word very much, especially in the context of conspiracy theories.
But it seems impossible to translate as a single German word, despite German having common diminutive suffixes like -chen.
What are general common rules and colloquial options to minimize (verniedlichen) German terms by using suffixes and/or phonetic tricks?