Thursday Morning Riddle

I’m belief of the need for complete redesign;
I’m the root of a number; the name for that sign;
The translation described by philosopher Quine;
And the feminist stance that takes quite a hard line.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    RADICAL Back with a vengeance, are you?

  2. Bill Says:

    RADICAL is correct. Way to go, Asher!

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