Suppose you entered into a contract to clean someone's pool. then, both you and the pool owner discovered that the pool water has produced toxic levels of chlorine over time. as a result, you cannot clean the pool without first decontaminating it. this change in knowledge about the toxicity levels of the pool is considered a material fact in the agreement. can you rescind the contract?

Yes

Explanation:

Yes the contract can be cancel or revoke by either side. Because it seems to be mutual mistake or an unnoticed mistake which can be made by either party.

When either parties can make mistake about the past material fact or current material fact, either party can choose to revoke or cancel the contract because of an undeclared or unnoticed fact.

Rescinding the contract is absolutely fair.

Thus the answer is "yes, the contract can be rescind."

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.