Univ. “reports”; m = authorised; x = true; y = trustworthy.

m′x′1m1y′0

No Conclusion. [Fallacy of Unlike Eliminands with an Entity-Premiss.]

27. Some pillows are soft;
No pokers are soft.
Some pokers are not pillows.

Univ. “things”; m = soft; x = pillows; y = pokers.

xm1ym0xy′1 [Fig. II.

Conclusion wrong: right one is “Some pillows are not pokers.”

28. Improbable stories are not easily believed;
None of his stories are probable.
None of his stories are easily believed.

Univ. “stories”; m = probable; x = easily believed; y = his.

m′1x0ym0xy0 [Fig. I.