Another example of heuristic making an algorithm faster occurs in certain search problems. Following the heuristic processes come analytic processes. Mallba is a library for combinatorial optimizations supporting exact, heuristic and hybrid search strategies. Both heuristic and systematic processes may occur independently. Another factor that affects the availability heuristic in frequency and probability is exemplars. There are various methods to determine the heuristic matrix. Each is usually based on a certain heuristic with an insight into the evolutionary process. Matching bias is a non-logical heuristic. This in turn helps predict the performance on cognitive bias and heuristic tests. Still widely used are the Espresso heuristic logic minimizer and Magic. Renteln faults philosophers for disregarding the heuristic and critical functions of cultural relativism. This is a very flawed system but is somewhat useful as a heuristic. Peter Hart invented the concepts we now call admissibility and consistency of heuristic functions. The "Linda Problem" illustrates the representativeness heuristic (Tversky & Kahneman, 1983). This problem does not occur if the heuristic is convex.