CONCEPT
The Heuristics of Fear
Jonas's methodological principle that in conditions of genuine uncertainty about powerful action, the worse prognosis must be given priority — not because it is more likely, but because its consequences may be irreversible.
The phrase is easily misread as counsel of timidity — a philosophical justification for the faint-hearted. Jonas meant something more precise: fear as an organ of perception, a heuristic, a method of guided discovery. Human beings possess, through evolutionary inheritance, a more reliable capacity to recognize danger than to envision benefit. The organism that failed to detect threats did not survive; the organism that missed opportunities merely went hungry. This asymmetry of survival consequences produced a corresponding asymmetry in perceptual acuity. Jonas elevated this biological observation into an ethical principle: in conditions of uncertainty about the consequences of powerful action, the worse prognosis must be given methodological priority. Not because it is more likely. Because the consequences of being wrong about it are categorically different from the consequences of being wrong about the better one.
In The You On AI Field Guide
The principle is distinct from pessimism. Pessimism holds that the worse outcome is probable or