The same event - a colleague missing a deadline - is explained four ways. Put the explanations in order from the MOST situational to the MOST dispositional.

1. Her server crashed and destroyed two days of finished work.
2. She was handed the brief three days later than everyone else was.
3. She finds it hard to prioritise when several urgent tasks land at once.
4. She is fundamentally unreliable and always has been.

The first two name external events that would have hindered anyone; the third names a specific personal tendency triggered by a particular situation; the fourth is a global trait claim that ignores circumstances entirely. The slide toward the fourth explanation, when the first two are available, is what the fundamental attribution error looks like in practice.