But there is not single convenient explanation which covers all the cases.

He's got a convenient explanation for the bruises and the scratch on his face.

He's got a convenient explanation for why he was at the bar drinking.

He's got a convenient explanation for why he was in the woods.

He said "cult" rumors spread because they were a convenient explanation about his isolation.

All the convenient explanations and coincidences were making Richard more than just a little suspicious.

Transportation problems associated with the cold spell gave many people a convenient explanation for being late to work and early to leave.

But the world will find a more convenient explanation.

However this convenient explanation of his style bore no relation to what we did know about O's past life with other men.

It is possible, but I think that would be too convenient an explanation.