For those confused about uni-conditionals vs. bi-conditionals, consider these:
Uni-conditional example: "You will receive a medal if you finish the race in first-place."
We can logically create this diagram: finish race in first-place → receive a medal
Steve received a medal. Can we logically conclude that he therefore finished in first-place? No! The rule only tells us what happens if people finish first-place. Perhaps people who finished second and third also received a medal. Maybe every race participant received a medal! Who knows?
"You will receive a medal if and only if you finish the race in first-place."
The arrows now point both ways: finish in first place ↔ receive a medal
Christopher received a medal. Can we therefore logically conclude that he finished in first place? Yes!
(likewise, if we were just told that Christopher "finished in first-place," we could also logically conclude that he therefore received a medal).
42
Topics
PT Questions
Select Preptest
You've discovered a premium feature!
Subscribe to unlock everything that 7Sage has to offer.
Hold on there, stranger! You need a free account for that.
We love that you want to get going. Just create a free account below—it only takes a minute—and then you can continue!
Hold on there, stranger! You need a free account for that.
We love that you came here to read all the amazing posts from our 300,000+ members. They all have accounts too! Just create a free account below—it only takes a minute—and then you’re free to discuss anything!
Hold on there, stranger! You need a free account for that.
We love that you want to give us feedback! Just create a free account below—it only takes a minute—and then you’re free to vote on this!
Subscribers can learn all the LSAT secrets.
Happens all the time: now that you've had a taste of the lessons, you just can't stop -- and you don't have to! Click the button.
For those confused about uni-conditionals vs. bi-conditionals, consider these:
Uni-conditional example: "You will receive a medal if you finish the race in first-place."
We can logically create this diagram: finish race in first-place → receive a medal
Steve received a medal. Can we logically conclude that he therefore finished in first-place? No! The rule only tells us what happens if people finish first-place. Perhaps people who finished second and third also received a medal. Maybe every race participant received a medal! Who knows?
----------------------------------------------------------------
However, consider this bi-conditional example:
"You will receive a medal if and only if you finish the race in first-place."
The arrows now point both ways: finish in first place ↔ receive a medal
Christopher received a medal. Can we therefore logically conclude that he finished in first place? Yes!
(likewise, if we were just told that Christopher "finished in first-place," we could also logically conclude that he therefore received a medal).