Echo Logic by Mark Lemon

Effect

Echo Logic is a digital magic trick that uses borrowed phones to create impossible predictions. The audience enters personal numbers into their own calculator, such as birth dates, random ratings, or daily-used digits. Without touching the phone or seeing the screen, the magician reveals the exact final calculation. The trick works live, over video calls, or even voice calls, making it highly versatile.

Full Details

Echo Logic is part of the Argon project by Mark Lemon. It requires no apps, gimmicks, or difficult math. The effect happens entirely on a spectator’s phone, whether iOS or Android. The method does not rely on fake calculators or pre-set apps. Instead, it uses clever psychological forces and natural interactions to guide the spectator to a specific result.

The trick includes multiple routines, such as forcing a total on every calculator in a room (10K Odyssey) or revealing a personal number the spectator generates (Atomic Code). iOS users get additional routines like Sum Duo, which focuses on number forces. The project comes with a printed booklet and over two hours of video tutorials.

Who Should Consider the Trick

Echo Logic is ideal for magicians who perform with phones, especially in casual or interactive settings. It works well for live shows, virtual performances, and even phone calls. Since it requires no setup or special devices, it’s great for impromptu magic. Performers who like audience participation and mentalism-style effects will find this particularly useful.

Difficulty

The method is not technically difficult, but it requires smooth audience management. The trick relies on natural conversation and subtle psychological forces rather than sleight of hand. Beginners can learn it, but performers with experience in mentalism or interactive magic will find it easier to execute convincingly. The tutorials provide clear guidance on handling different scenarios.

What Magicians Say

MurphysMagicSupplies describes Echo Logic as a "game-changer for digital magic." They highlight its versatility, working on any borrowed phone without the performer needing their own device. The Atomic Code routine is praised for allowing spectators to input personal numbers, making the reveal feel impossible. The 10K Odyssey is noted for its strong audience participation, forcing a specific total on multiple calculators at once.

The only limitation mentioned is that the trick requires a device with calculator functionality. Some routines may need extra audience interaction, which could be challenging in certain performance settings. Overall, reviewers emphasize its practicality and adaptability for modern performances.