Investigate the validity of each of the following
Chapter 0, Problem C.1.27(choose chapter or problem)
Investigate the validity of each of the following arguments:
(a) All women are mortal. Hypatia was a woman. Therefore, Hypatia was mortal.
(b) All squares are quadrilaterals. All quadrilaterals are polygons. Therefore, all squares are polygons.
(c) All teachers are intelligent. Some teachers are rich. Therefore, some intelligent people are rich.
(d) If a student is a freshman, then she takes mathematics. Jane is a sophomore. Therefore, Jane does not take mathematics.
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