(i) AH colours are varnishes → Universal Affirmative (A-type),
(ii) Some colours are paints → Particular Affirmative (I-type).
(iii) No triangle is circle → Universal Negative (E-type).
(iv) Some triangles are not circles → Particular Negative (O- type).
Some paints are
colours.
All colours are
varnishes.
I + A ⇒ I-type of Conclusion
“Some paints are varnishes.” (P)
All colours are
varnishes No
varnish is dye.
A + E ⇒ E-type of Conclusion
“No colour is dye.” (Q)
Some paints are
varnishes No
varnish is dye.
I + E ⇒ O-type of Conclusion
“Some paints are not dye." (R)
Some paints are varnishes.
Therefore, Conclusion II is possible.