What sins are not forgiven?

Can all mortal sins be forgiven and absolved by a priest? Even if the sinner, at the time of the sin, knew exactly what he was doing?

Yes.

[quote=clm999]Even if the sinner at the time of the sin, knew exactly what he was doing?
[/quote]

Yes.

The only sin that cannot be forgiven is final impenitence at death.

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