17. Concl. wrong: right one is “Some business, other than railways, is unprofitable.”
18. Concl. wrong: right one is “Some vain persons are not Professors.”
19. Concl. right.
20. Concl. wrong: right one is “Wasps are not puppies.”
21. No Concl. Fallacy of Unlike Eliminands with an Entity-Premiss.
22. No Concl. Same Fallacy.
23. Concl. right.
24. Concl. wrong: right one is “Some chocolate-creams are delicious.”
25. No Concl. Fallacy of Like Eliminands not asserted to exist.
26. No Concl. Fallacy of Unlike Eliminands with an Entity-Premiss.