Statements:
All Skirts are Shirts
Some Shirts are not Socks.
All Socks are Belts.
Conclusions:
I. Some Shirts are Skirts.
II. Some Socks are not skirts
All Skirts are Shirts (A) → Conversion → Some Shirts are Skirts (I). Hence conclusion I follows. All Skirts are Shirts (A) + Some Shirts are not Socks (I) → No conclusion. Hence conclusion II does not follow.