heuristic

形容词adjective

1. 1of an approach to problem solving, learning, or discoveryThat employs a practical method not guaranteed to be optimal or perfect; either not following or derived from any theory, or based on an advisedly oversimplified one. [from 1821]
2. 2(computing, of a method or algorithm) That provides a useful, but not optimal, solution to a problem. Such algorithms are typically employed either because the only known algorithms that provide optimal solutions use too much time or resources, or else because there is no known algorithm that provides an optimal solution.
3. 3of an argument