When you shine a flashlight at a wall, you aren’t surprised when the light beam gets absorbed by the wall, and the light does not emerge from the other side.
This obvious statement only needed a small extrapolation for the first tachyon scientists to become successful.
For the slow moving world, that of the bradyons, and the light speed moving world, that of the luxons, you can see your past light cone and predict whether there is going to be a wall in front of the flashlight or not. Sure there is a chance a fast moving braydon wall may get in front of your flashlight beam just after you turn it on, but you could see that coming. Similarly we know the luxons world, that of photons, cannot themselves make walls, so we might not know you are about to get zapped by a light beam outside your past light cone, but that isn’t a wall, an obstruction to bradyons or luxons.
And thus it was for the tachyons, to send them, you simply needed to make sure there isn’t a wall in the way. I say simply because it turns out that when you look in every spacelike direction here on Earth, there are quite a few other tachyonic structures. And so it was that for many years tachyonic scientists spent their time sending tachyon beams into tachyonic walls. It was only with the construction of tachyonic machines, the plow, the saw, the spade, that one could make sure that the tachyons you were sending were not just slamming into a tachyonic wall.
And so now we are gathered here to embark on a next step, beyond building simple tachyonic machines, with our new endeavor to build a tachyonic computer. What new use will we dream up for computers that compute sideways in time?