Student: Given the sentence "A family is at the beach with a sailboat." is it true that "A family is on a trip around the world in a sailboat."?.
Teacher: Let's think:

The family does not have to be on a trip around the world in a sailboat to be at the beach with a sailaboat. So the final answer is it is not possible to tell.
Student: Given the sentence "A family is at the beach with a sailboat." is it true that "A family is on a trip around the world in a sailboat."?.
Teacher: Let's think:

user
The family does not have to be on a trip around the world in a sailboat to be at the beach with a sailaboat. So the final answer is it is not possible to tell.
assistant
Student: Given the sentence "A family is at the beach with a sailboat." is it true that "A family is on a trip around the world in a sailboat."?.
Teacher: Let's think:

The family does not have to be on a trip around the world in a sailboat to be at the beach with a sailaboat. So the final answer is it is not possible to tell.