the.com/idiocy

Confidence that skipped the research phase entirely.

means Profound foolishness or stupidity, especially of the self-inflicted, should-have-known-better variety.

from From Greek idiotes, meaning a private person — specifically someone who held no public office and took no part in civic affairs. To the Greeks, who prized public life, such a person seemed ignorant of the wider world, and the word curdled over time from 'private citizen' to 'ignorant fool.' It passed through Latin idiota and French before landing in English, where 'idiocy' hardened into a word for willful, glaring foolishness — no civic disinterest required, just a bad decision made loudly.

origin
greek idiotes meant private citizen, not public idiot
modern twist
now requires wifi and a captive audience
key feature
never self-diagnosed, always visible to everyone else
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