Double or Nothing

The mind quails before certain contemplations?
The existence of infinity, for instance.
Or finity, for that matter.
Or 50,000 batches of cornflakes dumped from the sky.
I don't know why I listen to Artie Lindstrom. Maybe it's because at times (though certainly not—I hope—on as permanent a basis as Artie) I'm as screwy as he is. At least, I keep letting myself get sucked into his plans, every time he's discovered the invention that will change the world . He discovers it quite a bit; something new every time. And, Artie having a natural mechanical aptitude that would probably rate as point-nine-nine-ad-infinitum on a scale where one-point-oh was perfection, all his inventions work. Except—
Well, take the last thing we worked on. (He usually includes me in his plans because, while he's the better cooker-upper of these gadgets, I've got the knack for building them. Artie can't seem to slip a radio tube into its socket without shattering the glass, twist a screwdriver without gouging pieces out of his thumb, nor even solder an electrical connection without needing skin-grafts for the hole he usually burns in his hand.)
So we're a team, Artie and me. He does the planning, I do the constructing. Like, as I mentioned, the last thing we worked on. He invented it; I built it. A cap-remover (like for jars and ketchup bottles). But not just a clamp-plus-handle, like most of the same gadgets. Nope, this was electronic, worked on a tight-beam radio-wave, plus something to do with the expansion coefficients of the metals making up the caps, so that, from anyplace in line-of-sight of her home, the housewife could shove a stud, and come home to find all the caps unscrewed on her kitchen shelves, and the contents ready for getting at. It did, I'll admit, have a nice name: The Teletwist.
Except, where's the point in unscrewing caps unless you're physically present to make use of the contents of the jars? I mentioned this to Artie when I was building the thing, but he said, Wait and see. It'll be a novelty, like hula hoops a couple of decades back. Novelties always catch on.