Taught in example sentence
The cinema MUST surely have taught us all enough about the lives and work of conmen by now for us to find it ludicrously improbable that either of the two main characters would be willing to expose thousands of dollars of money already "in hand" in order to secure the alleged "sure thing" of a deal that is to net them many thousands more (after all, it is the endemic idiocy of such greed and of the general greed-driven tendency to forget the "bird in the bush" principle that is the very basis of a conman's livelihood).