Sentence 1: An auditor should recognize that there are different system development models that may be used when a system development effort is acquired.

Sentence 2: Different system development models exist.
OPTIONS:
- yes
- it is not possible to tell
- no
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: Bull, he croaked.

Sentence 2: He remained silent.
OPTIONS:
- yes
- it is not possible to tell
- no
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Still, nothing about the man-shaped thing before me seemed the slightest bit fake.

Sentence 2: The man in front of me seemed as real as any other person.
OPTIONS:
- yes
- it is not possible to tell
- no
Is this second sentence entailed by the first?

Answer:
yes