Question: Sentence A: Nonetheless, some of the best reports have come from observers who entered as fully as possible as participants in the event being investigated.

Sentence B: Observers gave reports that were all worthless.

If sentence A is true, how about sentence B?

Answer: no


Question: Sentence A: You can visit the factory throughout the year or buy from stores in the city center.

Sentence B: The city center is home to some shops.

If sentence A is true, how about sentence B?

Answer: yes


Question: Sentence A: High scorers on mental tests do bunch up (as Herrnstein and Murray put it) in elite-university student bodies.

Sentence B: Those who score high on mental tests tend to have more adversity in their life. 

If sentence A is true, how about sentence B?

Answer: it is not possible to tell


Question: Sentence A: The challenge is how to stop the landscape from being changed by the very people who come to marvel at it.

Sentence B: Visitors to the landscape risk damaging its natural beauty.

If sentence A is true, how about sentence B?

Answer:
yes