Some vessels are jars (I) + All jars are containers (A) = Some vessels are containers (I). ⇒ conversion ⇒ Some containers are vessels (I). Hence, conclusion I will not follow. All cans are vessels = (A) ⇒ conversion ⇒ Some vessels are cans (I). Hence, conclusion II will follow. Some containers are drums (I) ⇒ Probable conclusion ⇒ All drums may be containers (A). Hence, conclusion III will also follow. I + A = I, I + I = No conclusion. Hence, conclusion IV will not follow.