3. At Least One
If M is not selected then, then T must be chosen. You can then take the contrapositive: If T is not selected, then M must do it.
Now we’re going to introduce a new concept: combining conditionals. See this example (shown in the next video):
If Matt is NOT in the Office, then Tim is:
~M → T
Contrapositive of #1: If Tim is NOT in the Office, then Matt is.
~T → M
At least Tim or Matt must be at the office. Note: There’s nothing ruling out T and M being together.
- Now that you can combine statements, we can do more complex deductions, such as If and Only If.
Next LSAT: September 21st