A relatively new field of philosophy that comprises Zen, positive thinking and stoicism, that photographic investigators, such as I, just can't get enough of... The secret to engage one's subjects of the investigation in coffeelosophic chatter is to present them with a problem of the human existence or situation. And then shoot, trying to be a part of the chatter. It's not easy, subjects tend to get frustrated when the realise it's just a trick.  An experienced photographic investigator always participates convincingly!