Saying something and doing something are different. They claim it is true, but they haven't demonstrated it by doing it. If a company says they've built the fa

Saying something and doing something are different. They claim it is true, but they haven't demonstrated it by doing it. If a company says they've built the fastest car in the world, a reasonable response is "ok, let's see it drive faster than any other car can", even though they already said that it can do that.