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. I am pretty sure that “lift and cut” is just a manufacturers hype to sell he shaver and maintain that it is as good a razor. i hesitate to tread upon delicate ground, but it would be easy for women to check whether such a razor is as good as a real razor.
