Why if atheists could win an argument without lies, why do atheists lie?

Kant proved god is real but atheists lie "no proof" or "kant only meant as morality" as Wikipedia lied but see picture screenshot

Why if atheists could win an argument without lies, why do atheists lie?

https://plato.stanford.edu/entries/kant-religion/#KantOwnArguForGodsExis

So if they could win an argument without lies, why do they lie all the time?

Why if atheists could win an argument without lies, why do atheists lie?
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