Complex sentence: He decides to begin his case the same way he would in court, which is to state clearly the subject for discussion so that the speaker doesn't ramble on and the issue is not understood by the disputants.
Split into simpler sentences: He decides to begin his case the same way he would in court, which is to state clearly the subject for discussion. In this way, the speaker cannot wander dispersedly and the issue is not understood by the disputants.