Hitchhikers' code? (11 letters) — Crossword Helper

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The Clue

Hitchhikers' code? (11 letter answer)

The Answer

RULEOFTHUMB

Tags

code gauge hitchhiker nonscientific procedure ruleofthumb unscientific

Notes

The answer RULEOFTHUMB is so rare that it appears less than once every 2500 puzzles.

Related Clues

Nonscientific gauge
Unscientific procedure