First of all, it's perfectly possible to waste time alone. A lot of social interaction is, however, a waste of time indeed. Waste in the sense that if you cou

First of all, it's perfectly possible to waste time alone. A lot of social interaction is, however, a waste of time indeed. Waste in the sense that if you could take the net sum of the learning and the enjoyment you would get from it, minus the effort (in particular if you lean towards the I end of the spectrum), depending on the kind of people you have the luck or misfortune to surround yourself with, you could easily go into the red.