Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.
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Question: Fact 1: Aggression is behavior that is intended to cause harm or pain. 
Fact 2: Also, pain is an excellent deterrent.

Answer: aggression can be a deterrent.


Question: Fact 1: gravity causes objects that have mass to be pulled down on a planet. 
Fact 2: Weight is the measurment of the force of gravity on a mass.

Answer: Weight is measured when objects are pulled down by gravity.


Question: Fact 1: a calculator is used for adding. 
Fact 2: Unlike that calculator, the abacus is a simple and much-affordable device.

Answer:
An abacus is used for adding.