Your local electronics store has just started selling time machines, anywhere doors, and invisibility helmets. You can only afford one. Which of these do you buy, and why?
First off, if everyone can have these things wouldn’t that create havoc?
Would you be able to purchase an Anywhere Door Blocker or an Invisibility Helmet Disabler ? I mean, you don’t want any old person just popping into your bathroom at any time would you?
I think I would go with the Anywhere Door for obvious reasons. I could just go somewhere, like the pyramids, take a look and then go somewhere’s else. Though I think that this door would seriously damage the tourism industry.
Another thought…is this a folding door, that you could just carry in a bag? Does it have a lock, so if stolen others can’t use? Is it free to use or will big business/government find a way to have a Charge by the Use fee?
All this is moot anyway, someone with a Time Machine would probably go back in time and ruin everything making sure that these things are never invented! Or maybe they already have!