ER 6 Categorical Syllogisms
2. All inventors are people who see new patterns in familiar things, so all
inventors are eccentrics, because all eccentrics are people who see new
patterns in familiar things.
3. Some snakes are not dangerous animals, but all snakes are reptiles,
therefore some dangerous animals are not reptiles.
4. Some foods that contain iron are toxic substances, for all fish containing
mercury are foods that contain iron, and all fish containing mercury are
toxic substances.
*5. All opponents of basic economic and political changes are outspoken
critics of the liberal leaders of Congress, and all right-wing extremists
are opponents of basic economic and political changes. It follows that all
outspoken critics of the liberal leaders of Congress are right-wing
extremists
6. No writers of lewd and sensational articles are honest and decent citi-
zens, but some journalists are not writers of lewd and sensational arti-
cles; consequently, some journalists are honest and decent citizens.
7. All supporters of popular government are democrats, so all supporters
of popular government are opponents of the Republican Party, inas-
much as all Democrats are opponents of the Republican Party.
8. No coal-tar derivatives are nourishing foods, because all artificial dyes
are coal-tar derivatives, and no artificial dyes are nourishing foods.
9. No coal-tar derivatives are nourishing foods, because no coal-tar deriva-
tives are natural grain products, and all natural grain products are nour
ishing foods.
10. All people who live in London are people who drink tea, and all people
who drink tea are people who like it. We may conclude, then, that all
people who live in London are people who like it.
