Comment by ssl-3

A child only knows the way to school because outside influences have previously shaped the path that they are expected to follow. They're motivated to walk there because present influences seek to enforce the necessity of accomplishing this task.

Even the mere existence of a predetermined destination (in this instance, the location of a particular school that they did not choose themselves) is influential to their behavior.

If we use the definition that you're so defensively in favor of, then it is impossible for this child to be walking to school autonomously.