This photo is the first working transistor 1947
It's in a lab its only just working a little.
If someone showed me this and said:
"This is just the beginning, from this thing here, will come a revolution that lets people talk over distance, around the planet, for almost nothing, guides planes, controls machines, calculates numbers, makes artificial intelligence possible.... lets you talk on video phones....
"You are crazy..." is what I would say.
But that is what happened.
What else can happen.... ?
How do you know what a simple little idea can lead to....
and how do you know that some 'great idea' is really going nowhere?