Capable and able are not the same. You can start collecting that data right now. It's also not a particularly complex task to collect information about people's

Capable and able are not the same. You can start collecting that data right now. It's also not a particularly complex task to collect information about people's habits. I'm not capable of running a mile in 4minutes, that's not unfair for me to loose to someone that trained hard to be able to run that mile in 4 minutes.