For no discernible reason, he becomes obsessed with tracking her down.

At this point, Gloucester leaves, but without any discernible reason.

"But if so, he's gone to a lot of work for no discernible reason."

They are simply nomadic and restless for no discernible reason.

There is no discernible reason he should have made off with the boy.

The Vulcan moved toward it, tense for no discernible reason.

But as we reach Exit 9, the traffic stops dead for no discernible reason.

He was in its icy grip again, though for no discernible reason.

When it briefly reappeared, there was no discernible reason for its return.

He also will often take his pants off for no discernible reason.