(a) “Good men are wise.”
(b) “No king is infallible.”
(c) “Cattle are ruminants.”
(d) “All who cheat the railroads are not honest.”
(11) What are contradictory propositions? Illustrate.
(12) What would be the simplest way of disproving the statement that “No great religious teacher has been consistent?”
(13) Why are A and E said to be contrary propositions?
(14) Define obversion.
(15) By what other name is obversion known?
(16) State the basic principle of obversion.