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Statement of Conversion

Description: Taking a statement of conversion as valid without actually hearing a reason for the conversion.

Logical Form:

I used to believe in X.

Therefore, X is wrong.

Example #1:

I used to be a Christian, now I know better.

Explanation: All this tells us is that the arguer changed his mind.  We don’t know why. Accepting this as evidence against Christianity would be fallacious reasoning.

Example #2:

There used to be a time when I didn’t believe, now I see the light and have accepted Jesus as my savior!

Explanation: All this tells us is that the arguer changed his mind.  We don’t know why.  Accepting this as evidence for Christianity would be fallacious reasoning.

Exception: This could be connected to the argument from authority, where the person making the claim does make a difference based on their background.


This a logical fallacy frequently used on the Internet. No academic sources could be found.

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