Statements:
Some wire are cable.
Some cable are hub.
Only hub is switch.
Some board are hub.
Conclusions:
I. No switch is board.
II. Some cable is switch.
III. Some wire are board.
Only hub is switch → All switches are hub and switch cannot have any positive relation with anyone. Hence conclusion I follows but conclusion II follows. Some wire are cable (I) + Some cable are hub (I) → No conclusion. Hence conclusion III does not follow.
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