If it rains, then the grass will not be dry
It didn't rain, so this grass is dry.
P:If it rains
Q; the grass will be dry
Major: Rain
Conclusion: It will be dry
1. P > -q
2. q
:-p
valid, and true.
If it rains, then the grass will not be dry.
It is a tautology because the truth table proves it to be. It makes sense in real life as a conditional statement.
mac,
ReplyDeleteyou chose a good syllogism to analyze, however, it is actually invalid because it follows the form
if a, then b
a not true
b not true.
and this is an inverse statement which is always invalid. there were a few other pieces missing in the explanation parts concerning the fallacies, as well. so, recall that the grass could not be dry for other reasons, like dew or sprinklers etc. with the exception of some missing pieces, still a good job.
professor little