When presenting logo concepts to a client it is often productive to have written rationales to accompany each concept. This can help you, the designer, clarify your thoughts before getting the concepts in front of your client. The rationales will help your client to better understand the concepts from your point of view (especially if you are not there in person to present the concepts to your client). In turn, this will help your client make an educated decision when picking their final logo. All that effort will also help you to better defend and explain concerns and questions that may arise during the logo revision process.