Question

10. Identify which argument is invalid.

Either the water is filtered or it contains lead.
The water is not filtered.
Therefore, it contains lead.


If the elephant roars, then it does not want company.
The elephant wants company.
Therefore, the elephant did not roar.


If I shower in the morning, then I do not smell bad.
I did not shower in the morning.
Therefore, I smell bad.


If the panda yawns, then she is not alert.
If the panda is not alert, then she will not smile for the camera.
Therefore, if the panda yawns, then she will not smile for the camera.