Too Long; Didn't Read
My 1.3.1 exercise solutions are also <strong>on Github </strong>here: <a href="https://github.com/bolducp/SICP/tree/master/exercises/chapter_01/1.3_exercises" target="_blank">https://github.com/bolducp/SICP/tree/master/exercises/chapter_01/1.3_exercises</a>