"They come up with a new explanation every time," he said.

She could see him trying to come up with an explanation for what he had done.

I'm going to have to come up with an explanation for him, when this is all over.

"At present I am unable to come up with a better explanation."

Later, of course, we always manage to come up with an explanation.

If she couldn't come up with a convincing explanation, her team would have to fight its way out.

We have to come up with an explanation of what killed her before she fell.

I can't come up with an explanation that makes more sense.

I couldn't come up with an explanation that made any sense to me.

In particular might we come up with an explanation for what has happened to the Net?