Venn diagrams exercise V04.3

Evaluating validity - ex V04.3

This page generates a random list of arguments. See if you can determine whether they are valid or not.

Every C is a B
No A is a B
⇒ Every A is a C

Not valid

Every C is a B
No C is an A
⇒ No A is a B

Not valid

No C is a B
Every C is an A
⇒ Every A is a C

Not valid

No C is a B
No B is an A
⇒ No A is a C

Not valid

Every A is a C
Every B is a C
⇒ Every C is a B

Not valid

No A is a B
No C is an A
⇒ No C is a B

Not valid

Every A is a B
No C is an A
⇒ No B is a C

Not valid

No B is a C
Every C is an A
⇒ Every B is an A

Not valid

No B is a C
Every C is an A
⇒ No A is a B

Not valid

No A is a C
Every C is a B
⇒ No A is a B

Not valid

I carry my thoughts about with me for a long time, often for a very long time, before writing them down.

Ludwig van Beethoven

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