This might have been a decent idea if he had thought of it an hour ago.
In the long history of the world, no decent idea ever came from a town.
I think when presented with alternative ideas, he can pick the decent idea.
I can't believe we sat in this car for eight hours and never came up with a decent idea.
If you have the cash and a few decent musical ideas, you cannot go far wrong.
Sometimes, a decent idea ends up being hard for the food chain to handle.
Apart from that there are some decent ideas but none which get to the heart of the problem in English rugby.
In other words, here is a decent idea for a satisfactory thriller.
And we have a decent idea of the mass of the star.
Usually, by this time, you start having a decent idea of what's going to happen.