"The gentleman over there with the portable Woolworth-bargain-counter seems to me to have the best theory."

Our best theory uses a large number of parameters.

The best scientific theories are at least partially true.

The best theory is that Daphne was in the car and so all the victims are tied together.

But it's the best theory I can come up with.

"Data's best theory is that these lines have something to do with zero-point energy extraction."

"My best theory is that those barrels will never move."

"At issue," he said, "is what's the best theory we can construct to explain this behavior?"

It is their best theory so they start him on gabapentin.

"The best theory I've got," he said, is that the gun went off when the plane hit the water.