Q: If "A young man in goggles observes several test tubes placed in a beaker." does that mean that "A young man stirs a mixture within a beaker."?
Options:
- yes
- it is not possible to tell
- no
A: A young man either observes or stirs a mixture within a beaker.
The answer is no.

Q: Premise: "A man dressed in a dark costume sitting at a restaurant table."
Based on this premise, can we conclude that the hypothesis "A man sits at a restaurant table waiting for his date." is true?
Options:
- yes
- it is not possible to tell
- no
A: Any person sitting at a restaurant table is not waiting for his date.
The answer is it is not possible to tell.

Q: If "Girls in the aftermath of a rainstorm continue on their way." does that mean that "Girls walking after a storm."?
Options:
- yes
- it is not possible to tell
- no
A: Girls are walking after a storm is a simplified version of the first sentence.
The answer is yes.

Q: If "A man in black shorts is stretching out his leg." does that mean that "No one is stretching."?
Options:
- yes
- it is not possible to tell
- no
A:
While a man is stretching out his leg it is impossible that no one is stretching.
The answer is no.