I think you are splitting hairs on the the sleight of hand versus deception comparison. When I read this my immediate reaction was that you are starting the relationship on a lie. I've been in sales to some capacity for a long time and spent 13 years as a recruiter. Not room for sleight of hand or deception there. Best thing to do as a salesperson is to listen and offer a solution that solves the problem and if you can't let them know. Don't take it personal, you can't help everyone. Just my experience, that's for sharing the post.
RE: Number 1 Sales Technique