To see him as the embodiment of irrationality is to be certain of our own rational cause and motives.

There would appear to be no rational cause for this-and yet, is it therefore suitable to attribute the phenomenon to supernatural interference?

There had to be a reason, some rational cause, for the silence.

She had no rational cause to blame anyone - not him, and certainly not herself.

No rational cause could be found for the explosion - it was simply designated an act of god.

"If Dua had some rational cause for not wanting to initiate an Emotional, would that make a difference with you?"

The pain just did not have either a rational or worthy cause.

Another of the characteristics of 'The Thing' is that it doesn't have a rational cause.

Then, while still using the drug, the patient experienced repeated panic attacks, paroxysms of terror that had no rational cause.

Is it not possible that their good fortune has a rational cause?