by ohthatpatrick Tue May 09, 2017 2:32 pm
Sorry for the delayed response. It's not easy for me to access ARCADE questions, so if you end up posting about any in the future, try to copy the Arcade question into your forum post, if possible.
This one was
If L is assigned to Wed, K will be assigned to Monday.
For every conditional statement we ever see,
1 --> 2
We take the contrapositive, which looks like
-2 --> -1
So contraposing the conditional they gave us would look like
"If K is NOT assigned to Mon, L is NOT assigned to Wed"
Your choices were
- Km --> - Lw
and
Km --> -Lw
We want the first one. The second one is wrong because "Km" didn't get negated.
That second choice is akin to being given
1 --> 2
and then saying
2 --> - 1