Dennis Hackethal has been writing about Critical Fallibilism's (CF's) core ideas, on his Veritula website, but he doesn't name or credit CF or me. Instead, he claims the ideas were invented by Karl Popper and are part of Popper's philosophy, Critical Rationalism (CR). Because CF is partially based on CR, this claim may seem superficially plausible, so I'll address it.
This is a companion discussion topic for the original entry at https://criticalfallibilism.com/dennis-hackethal-falsely-implied-that-critical-fallibilism-plagiarizes-karl-popper/