Free will, which proponents cannot/will not define as it is not biblical; Free Will would make the praying for others salvation a useless endeavor for it would violate the fictitious doctrine of Free Will by praying to God to override the persons Free Will.
Assuming Free Will were true ... one aspect of it would be the ability of one person's Free Will to nullify another's Free Will. For example, Stalin cause the death of millions and thus nullified their Free Will. The definition of Free Will means another person or God cannot nullify someone's Free Will. Clearly this is not true. Clearly Free Will is a human fabrication that does not stand up to scrutiny.
Assuming Free Will were true ... one aspect of it would be the ability of one person's Free Will to nullify another's Free Will. For example, Stalin cause the death of millions and thus nullified their Free Will. The definition of Free Will means another person or God cannot nullify someone's Free Will. Clearly this is not true. Clearly Free Will is a human fabrication that does not stand up to scrutiny.