“oomis1105-“destroying” the beard is not prohibited. For ex. you can use ON THE SKIN, acid to shave. This actually was (maybe still is ) used by many israeli yeshiva bochurim . “Mishi” was the brand name. only ‘destruction” by a knife is prohibited. I don’t know what your son did, but “lift and cut” does NOT reach the skin-otherwise, you would have lots of skin cuts and this does not happen. “
ROB, I didn’t say destroy the “beard,” I said destroy the ROOT. Those are two different things. My son had a Norelco shaver, and his rebbie told him that it potentially can destroy the root of the beard, the way it is designed because it plucks the root, and that the action of cutting as this SPECIFIC shaver cuts, is one that is not permissible without modifying the shaver’s blades. Whether or not this is hal;achically so, I cannot say, but once the rebbie mentioned it to him, he followed his advice as to how to modify it.