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- PowerScore Staff
- Posts: 91
- Joined: Sep 06, 2021
- Fri Sep 17, 2021 1:47 pm
#90493
Hi there,
The rule is ~(L before F) --> L is on Saturday. The contrapositive of that is: L is NOT on Saturday --> L before F. The inference you described is the contrapositive, which is valid!
You are correct that if L is on Saturday, then the other librarian on duty must be G or Z because based on the diagram, those are the only two variables with nothing that follows. As you said, it doesn't lead to determining the placement of any other variables though.
Best,
Eveline
The rule is ~(L before F) --> L is on Saturday. The contrapositive of that is: L is NOT on Saturday --> L before F. The inference you described is the contrapositive, which is valid!
You are correct that if L is on Saturday, then the other librarian on duty must be G or Z because based on the diagram, those are the only two variables with nothing that follows. As you said, it doesn't lead to determining the placement of any other variables though.
Best,
Eveline