We train the technology using multiple signals.
Guns sometimes were double-shotted with canister or grape on top of ball, or even triple-shotted with very small powder charges which still were enough to cause horrible wounds at close range.
The rise of flexible working practices, combined with technological advancements, mean that the jobs we do, and the way we do them, is changing — mostly for the better, for all generations; younger and older.
He had a lot of experience with illusions, and he wanted to expose all the frauds, the ones who successfully fooled scientists and regular people.
In 1862, a famous Irish physicist and mathematician, Lord Kelvin, estimated that Earth was between 20-million and 400-million years old.
As such, different civilizations entered the Bronze Age at very different times and lasted far longer in some places than in others.