[pg136]16. Univ. is “books”. The phrase “make one drowsy” may be replaced by the phrase “are books that make one drowsy”.
The Sign of Quantity is evidently “all”.
The Proposition may be written
“All | unexciting books | are | books that make one drowsy”.
17. Univ. is “men”. The Subject is evidently “a man who knows what he’s about”; and the word “when” shows that the Proposition is asserted of every such man, i.e. of all such men. The verb “can” may be replaced by “are men who can”.
The Proposition may be written
“All | men who know what they’re about | are | men who can detect a sharper”.
18. The Univ. and the Subject are the same as in Ex. 4.
The Proposition may be written
“All | Members of the Class ‘you and I’ | are | persons who know what they’re about”.