So, I thought the point of social interaction was to test our theories against each other like antibodies seeking pathogens (see the ‘good’ and ‘evil’ in that story!). Recently I’ve been literally talking to myself (as here). Why would I do that? Well, if things are slightly stochastic, the two will resonate. Oscillate.  This mental exercise I’ve been enjoying seems self-sustaining (=dopamine, optimism), and it ‘feels’ like the above.  So this is a good (or amusing) description.