Comparing motion generation and motion recall for everyday mobile manipulation tasks

When first posed with the problem 15 × 15, we may generate the answer by applying a set of rules, e.g breaking the problem down into (10 + 5) × 15 and solving the subcomponents of these simpler multiplications first [2]. But after having solved this problem several times, we simply recall that the answer to 15 × 15 is 225. This distinction between generation and recall can also be applied to motor planning [2], as described in the next two sections.