Hanlon's Razor: prov. A corollary of {Finagle's Law},

:Hanlon's Razor: prov. A corollary of {Finagle's Law}, similar
to Occam's Razor, that reads "Never attribute to malice that which
can be adequately explained by stupidity." The derivation of the
common title Hanlon's Razor is unknown; a similar epigram has been
attributed to William James. Quoted here because it seems to be a
particular favorite of hackers, often showing up in {sig
block}s, {fortune cookie} files and the login banners of BBS
systems and commercial networks. This probably reflects the
hacker's daily experience of environments created by
well-intentioned but short-sighted people. Compare {Sturgeon's
Law}.
-- The AI Hackers Dictionary