QUESTION: Given the sentence "A boy takes off his glasses while playing with his toy trains." is it true that "A boy removes his glasses to clean them."?

Let's solve it slowly: You don't always have to clean your glasses when you remove them.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "A man sits on a train with a suit and red shirt." can we conclude that "A man is sitting."?
Options:
- yes
- it is not possible to tell
- no
The man who is sitting has a suit on with a read shirt.
The answer is yes.

Q: Test for natural language inference.
Premise: "Many people walking down a busy street holding umbrellas in the rain."
Hypothesis: "Many people are walking down the street under umbrellas."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: Many people are walking down the street under umbrellas is a slightly shorter version of people walking down a busy street holding umbrellas in the rain.
The answer is yes.

QUESTION: If "A man and a young girl in a flowered dress are on the porch." does that mean that "Cow eats leaves."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: A cow is an animal whereas a man and a girl are human beings.
The answer is no.

[QUESTION] Premise: "A man is skiing down a snowy hill while he casts a long shadow."
Hypothesis: "The man is on a dangerous course."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A snowy ski hill is not necessarily indicative of a dangerous course.
The answer is it is not possible to tell.

Q: Premise: "Two people sitting on a tree stump in front of a pond."
Hypothesis: "People sitting outside by a pond."
Do we know that the hypothesis entailed by the premise?
A:
Sitting in front of a pond is a way of sitting by a pond and a pond is outside so if people are sitting by a pond then they are sitting outside.
The answer is yes.