Problem: If "In the middle of the outdoor concert, the rain started falling, but it continued until 10.", does it follow that "The concert continued until 10."?

Answer: yes


Problem: If "Sam and Amy are passionately in love, but Amy's parents are unhappy about it, because they are fifteen.", does it follow that "Sam and Amy are fifteen."?

Answer: yes


Problem: If "Fred and Alice had very warm down coats, but they were not prepared for the cold in Alaska.", does it follow that "coats were not prepared for the cold in Alaska."?

Answer: no


Problem: If "The signs over the shops' doors had pictures that indicated what work was done inside. Although more and more people were learning how to read, each artisan still had signs, not wishing to lose a possible patron merely because he happened to be illiterate.", does it follow that "Each artisan still had signs, not wishing to lose a possible patron merely because the artisan happened to be illiterate."?

Answer:
no