This is a reasonable approximation of stock price dynamics except for rare events.

He was old enough that he knew how to create a reasonable approximation of a human.

They decided finally that the code could be considered binary "to a reasonable approximation."

Many might consider this a reasonable approximation of an afterlife.

Then he added, with a chuckle, "The only one here who still has an actual job- or at least a reasonable approximation."

We view this as a main effect and thus a reasonable approximation.

In the absence of such precision, reasonable approximations may be considered.

Given sufficient samples, a reasonable approximation of the value can be achieved.

And then he does the whole thing again until he has a reasonable approximation of the original.

The most we can hope for is a reasonable approximation of the truth.