No incidence of violence stems from a simple cause, or a single motive.

In the simple cause of common sense, I counsel you to be cautious about this.

But how can something that seems so simple cause such a boom?

"How like a man to think it was some simple cause, without examining all the facts."

That would be the simplest, most logical cause and solution.

Everything in my early life had conditioned me to recognize this simple cause and effect.

This has a very simple cause, I am completely overworked.

But researchers say the new outbreak probably does not have such a simple cause.

This, I told him, was the simple cause of 'the bell'.

A simple cause was the fact that, in the words of one observer, 'For two years the land has produced nothing'.