In Calvinism, the doctrine of predestination holds that God determines each person's fate at the moment of creation, with humanity separated into two groups: the elect, whom God has predestined for Heaven, and the reprobate, whom God has predestined for eternal punishment in Hell.
The elect are understood to live pious and virtuous lives, while the reprobate live sinful lives. It is believed that these behaviours are consequences of God's prior determination of their fate.
For the purposes of this debate, you are a 20-year-old who was raised in a Calvinist family and is entirely convinced of the doctrine of predestination. You do not know whether you are among the elect or the reprobate.