Conclusions:
I. No Google is a Facebook.
II. All Twitter can be Instagram.
From I. All Instagram are Google (I) → Conversion → Some Google are Instagram (I) + Only a few Instagram are Facebook (I) → No conclusion. Hence conclusion II does not follow. Some Twitter are Google (I) + [All Instagram are Google (I) → Conversion] → Some Google are Instagram (I) → Probable conclusion → All Twitter can be Instagram (A). Hence conclusion II follows. From II. Some Facebook are Instagram (I) + All Instagram are Google (A) → Some Facebook are Google (I). Hence conclusion I does not follow. All Twitter are Facebook (A) + Some Facebook are Instagram (I) → No conclusion. Hence conclusion II does not follow. From III. All Google are Twitter (A) + No Twitter is a Facebook (E) → No Google is a Facebook (E). Hence conclusion I follows. No Twitter is a Facebook (E) → Conversion → No Facebook is a Twitter (E). Some Instagram are Facebook (I) + No Facebook is a Twitter (E) → Some Instagram are not Twitter (O) → Probable conclusion → All Twitter can be Instagram (A). Hence conclusion II follows. From IV. Only Twitter are Google → All Google are Twitter and Twitter can have negative relation with anyone. Hence conclusion I follows but conclusion II does not follow.
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