QUESTION: Given the sentence "Some people are standing outside at a sidewalk book sale." is it true that "A bookstore is selling remaindered books outside."?

Let's solve it slowly: A store having a sidewalk book sale doesn't mean they are selling remaindered books.
The answer is it is not possible to tell.


QUESTION: Given the sentence "Mountain bike riders on a dirt trail." can we conclude that "The riders are on vacation."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Not all riders on a dirt trail are on a vacation.
The answer is it is not possible to tell.


QUESTION: Premise: "Dogs race on a track."
Hypothesis: "Dogs are chasing a toy."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly:
Dogs racing on a track are not always chasing after a toy.
The answer is it is not possible to tell.