Question: If "I took the water bottle out of the backpack so that it would be handy.", can we conclude that "I took the water bottle out of the backpack so that the backpack would be handy."?
Answer: no

Question: If "The foxes are getting in at night and attacking the chickens. I shall have to kill them.", can we conclude that "I shall have to kill The chickens."?
Answer: no

Question: If "Jane knocked on Susan's door, but there was no answer. She was disappointed.", can we conclude that "Jane was disappointed."?
Answer:
yes