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Confusion of \"Necessary\" with a \"Sufficient\" Condition


Logical Fallacy of Confusion of "Necessary" with "Sufficient" Condition

Confusing "necessary" with "sufficient" condition is a formal fallacy that covers up the problem when reasoning is based on one of the three fallacies of Agrippa's trilemma. Whenever a logical fallacy is committed, the fallacy has its roots in Agrippa's trilemma. All human thought (without Divine revelation) is based on one of three unhappy possibilities. These three possibilities are infinite regress, circular reasoning, or axiomatic thinking. This problem is known as Agrippa's trilemma. Some have claimed that only logic and math can be known without Divine revelation; however, that is not true. There is no reason to trust either logic or math without Divine revelation. Science is also limited to the pragmatic because of the weakness on human reasoning, which is known as Agrippa's trilemma.

The Logical Fallacy of Confusion of "Necessary" with "Sufficient" Condition occurs when something that is necessary for an event or condition is sufficient to assure that the event or condition will occur. 

INVALID FORM

"if A is true, then B is true;
B is true, therefore A is true."

Examples of the Logical Fallacy of Confusion of "Necessary" with "Sufficient" Condition

“They said that if I pray to Jesus, He will make Himself real to me. I knew that was false because He doesn’t exist, so I prayed just to prove it. He didn’t make Himself real to me just as I thought. And I even crossed myself and held some Rosary beads! See. Jesus doesn't exist. This proves it.”

This is invalid form. Beyond this, it appears that this person has a preconception against God and prayed insincerely for the sole purpose of proving to himself that "God doesn't exist." God knows that thoughts and intents of the heart. He will not be mocked.


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