(1) “All honest men pay their debts.”
(2) “All men are rational.”
(3) “Nearly all the troops have left the town.”
(4) “Some teachers are not patient.”
(7a) The attending scheme indicates the logical process and rule involved in passing from one proposition to another:
A. “All men are imperfect.”
Process: Obversion.
Rule: Negate predicate and change to E.
E. “No men are perfect.”
Process: Simple Conversion.