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3
votes
The formulation is a little unclear. What is meant is that Jennifer has always left for school at 7am until now, and has always been on time until now. It is no premise that Jennifer is always on time …
answered Aug 8 '15 by Keelan
5
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In logic, a tautology (from the Greek word ταυτολογία) is a formula that is true in every possible interpretation. – Wikipedia There is an 'interpretation' possible in which snow does not melt du …
answered May 19 '15 by Keelan