The law of gravity is useful. Science has no explanation for it.
As Scott mentioned, scientists should be reminded that induction is fallacious reasoning and can never provide absolute truth. Even with something like gravity, there's nothing about throwing a ball into the air and seeing it fall down 10 times which logically implies that it will fall down on the eleventh. They'll probably laugh at this and pretend like it doesn't matter, but then again, most of them are also fools who say in their heart that there is no God.