Statements: Some colours are paints. All colours are varnishes. No varnish is dye. Conclusions: I. Some varnishes are paints. II. No dye is colour.
Statements: Some colours are paints. All colours are varnishes. No varnish is dye. Conclusions: I. No paint is dye. II. All paints being varnishes is a possibility.
Statements: P $ Q, Q δ S, S * R
Conclusions:
I. S * P
II. S $ P