Many explanations of the origin of the word jeep have proven difficult to verify.

He could not even guess how valuable his explanations would prove to be.

So the archdiocese's demand for further explanation will prove onerous to many plaintiffs, lawyers said.

His explanation of the composition proved fruitless before the judge.

But what would the 21st-century economy look like if only the first explanation proves accurate?

The arrangement had not been effected without friction, the explanation had proved difficult.

Sensing that neither explanation would prove correct, seeking a third, Molly was startled by movement on the porch.

She shook her head as though it were very hard to understand why such a simple explanation should prove so hard for Ali to grasp.

But the instant analyses and explanations prove to be helpful, and it's fascinating to watch the past merge with the present.

If these explanations prove to be less than satisfactory, things are going to get unpleasant for everyone involved.