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The Clue

Former W.C.T.U. head (5 letter answer)

The Answer

BOOLE

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Notes

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

Related Clues

Pioneer in mathematical logic
English mathematician: 1815-64

Definition

BOOLE as a noun:

1. (Boole, George Boole) = English mathematician; creator of Boolean algebra (1815-1864)