"We haven't seen anything to cause us to change our minds."

It says nothing, however about what might cause these things to change.

For many people this is causing them to change their energy use.

It did not, however, cause me to change my opinion.

What he saw there caused him to change his mind.

We also know what caused this to change, when and how.

"It would cause you to really change to a much simpler form."

Whatever it was that caused him to change his mind, she would never know.

And I have no evidence at the time which would cause me to change my position.

Nothing I have heard in this debate would cause me to change my mind.