I've learned there are patterns to how people behave when they're trying to trick you:
- The eyes may be wider than normal;
- They may demand action with no time to think about what they said;
- If you smile and say "yeah?" they normally can't help smiling back;
- The more outrageous their hard luck story is, the more shocked you'll be. This makes you more likely to believe the story. At the start of any hard luck story where they look sad and their voice drops, turn on your disbelief immediately.
You'll learn others. These days, I don't believe anything without proof unless I know the person really well.
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To eliminate poverty, you have to eliminate at least three things: time, the bell curve and the Pauli Exclusion Principle. Have fun.