Question:
I did not know it until afterwards.

Does it follow that "I knew right away."?
Answer:
no

Question:
These are only for decoration and not intended to ward off evil spirits volcanic or otherwise.

Does it follow that "These decorations are vital to keeping spirits at bay."?
Answer:
no

Question:
The final rule contains new effluent limitations guidelines and standards under the Clean Water Act for a portion of the pulp, paper, and paperboard industry, and national emission standards for hazardous air pollutants under the Clean Air Act as amended in 1990 for the pulp and paper production source category.

Does it follow that "The Clean Air Act put great restrictions on the paper industry in 1990."?
Answer:
it is not possible to tell

Question:
Just to the east of town is a small scruffy bay that comes to life at night.

Does it follow that "Though quiet durihng the day, the little bay is raucous at night."?
Answer:
it is not possible to tell