Statements:
All gold are silvers.
All silvers are diamonds.
Some diamonds are ruby
No ruby is silver.
Conclusions:
I. No silver is a gold.
II. Some rubies are golds.
III. Some diamonds are golds.
All golds are silvers (A)+ All silvers are diamonds. (A) = All golds are diamonds (A) ⇒ Conversion ⇒ some diamonds are golds. (I) Hence III follows.
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