Short idea (59): If you have a camera whose pictures are getting more and more inaccurate — this is a good metaphor for getting old. Decaying tools can cause problems. There are additional problems if you don't know your tools are decaying. And still more problems when you insist to others that everything's fine when everyone can see it isn't.

Short idea (89): Say there is a king who is a great man, and he has a servant. This doesn't mean that the servant is a great man (or even a great servant).

Short idea (161): Memory is a skill.