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by Cecily
Sat Jun 22, 2013 11:49 am
Forum: Logic and Philosophy of Mathematics
Topic: All A are B, Some B are C, therefore some A are C?
Replies: 28
Views: 56389

All A are B, Some B are C, therefore some A are C?

A syllogism problem.

All A are B, Some B are C, therefore some A are C?


Is this valid or invalid and why? Please explain by using Venn Diagram also.

I thought it was valid, but something wrong when using Venn Diagram. I don't under stand, please help. Thank you.