St John Bosco saw his dead mother.
Surely that is evidence her soul is immortal.
Many of the saints saw those in Purgatory or heaven. The evidence out there is staggering.
Surely if a living person sees a deceased soul, that.is evidence that a soul is immortal?
Why go to philosophy when you have concrete evidence such as Maria Simma’s in Austria who for her whole.life saw the deceased Souls in Purgatory visiting her for prayer, read her book by Nicky Eltz. The saints have countless examples. No need to use reasoning when there is hard concrete solid proof throughout all the lives of the saints of Heaven, Purgatory, and that human Souls are there or lost.