Three Conditions Of A Bug's Existence

A bug exists only if ALL of the following three conditions are met:

1. We know the expected result

2. We know the actual result

3. We know that the actual result deviates from the expected result

Every time you see a mismatch between the actual and expected, label that situation with the word "bug." As time goes on, you'll develop a habit, which will gradually grow into a reflex. Please note that for the sake of this training, it doesn't matter how futile, cheap, or temporary your expectations are - the main thing here is to gain the skill of automatic bug recognition.

Example

Here are some more bugs from real life:

1. A nice face backed by an ugly personality.

2. Parrots say the nastiest words at absolutely inappropriate times.

3. Hollywood story: reach fame and drink yourself to rehab.