guinea pigs never really appreciate Beethoven

wakanomori shared with me some of Lewis Carroll's crazy-complicated symbolic-logic syllogisms (these are all in the common domain--he saw them in Lapham's Quarterly, but you can find more at Project Gutenberg here). To wit:

Nobody, who really appreciates Beethoven, fails to keep silence while the Moonlight-Sonata is being played;
Guinea-pigs are hopelessly ignorant of music;
No one, who is hopelessly ignorant of music, ever keeps silence while the Moonlight-Sonata is being played.
Guinea-pigs ne...