Student asked: If "A large boat drives through the harbor." does that mean that "A boat floats on the water."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. Since the boat is driving through the harbor it must be floating on water. The answer is yes.

Student asked: Can we conclude from "A snowboarder leaves a trail of snow on the mountain." that "The snowboarder is doing a back flip."?
Options:
- yes
- no
- it is not possible to tell
Teacher's response: Let's think. One either leaves a trail or is doing a back flip. The answer is no.

Student asked: If "A young woman riding a bike down a street past a crowd of people." does that mean that "A young woman is riding the bus to school."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. A young woman cannot be riding a bike and a bus at the same time. The answer is no.

Student asked: Premise: "A colorfully dressed row of people carrying drums in a parade."
Based on this premise, can we conclude that the hypothesis "The people are wearing all black." is true?
Options:
- yes
- it is not possible to tell
- no
Teacher's response:
Let's think. The people can't both be colorfully dressed and be wearing all black. The answer is no.