“Plastic” is well understood, it works, it’s accepted everywhere around the world —and each card is a totem of a distinct account.

Decide takes into account 40 distinct price factors, historical data on model lineage releases and pricing, and relevant rumors on when the next iteration of a product is coming.

I'll refer to the ancient proposal as "philosophical happiness" to keep it distinct from conventional or common sense ideas about happiness, and from Gilbert's experience-based account of happiness.