exhausting syringe

IMG:content-1254.png:[blocks in formation] 1. Logic : A method of proving a point by showing that all other alternatives are impo ible, all the clements which bear against it being discu ed and shown to be untenable or absurd. 2. Math .: A method of proving the equality of two magnitudes by a reductio ad absurdum -that is, by showing that if either is greater or le than the other a contradiction will arise. 3. Physics: The term is much used in connection with the production of a vacuum, or rather an approach to one by an air-pump.