Goes back to the whole amateur/professional thing I guess.
I have no tattoos, however, I have friends that have many; I'd never heard it called anything but a tattoo gun until very recently.
Also until recently, I thought it was common knowledge.
Go figure.
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"People who harbor strong convictions without evidence belong at the margins of our societies, not in our halls of power. The only thing we should respect in a person’s faith is his desire for a better life in this world; we need never have respected his certainty that one awaits him in the next."
- Sam Harris