4. Opening a door

Another example.

You want to open your front door which is locked

• You know that locked doors can be opened with the correct key.
• You have that key
• So you use the key to open the door

This is how logic works - when a situation comes up you apply logic (common sense) to solve it.

Computers on the other hand have no common sense, it is far too difficult for them. So they use a different kind of logic.