We never have a full demonstration, although there is always an underlying reason for the truth, even if it is only perfectly understood by God, who alone penetrated the infinite series in one stroke of the mind. Gottfried Leibniz
No matter what political reasons are given for war, the underlying reason is always economic. A. J. P. Taylor
The long irons are the nemesis of the average golfer. I'm convinced that the underlying reason for this is that he keeps hearing how hard they are to handle. They're not that difficult, truly. Jack Nicklaus
Everything has an underlying reason. German Proverb
In my estimation, the underlying reason my opponent takes such negative action against me is because I filed to become your next White Pine County Clerk. Source: Internet
Cat wonders if her mother's unexpected revelation might be the underlying reason why she has always felt like a misfit. Source: Internet