Example
The leader of the yakuza shows you his knife. He says, "This is an example of a knife."
The leader of the yakuza is just showing you an example of a knife. Maybe to scare you? Why would an example of what a knife is scare you, though? Coming from the leader of the yakuza, this is a weird tactic.
れい
たと
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"This is an example," the leader of the yakuza tells you. "Next time, I'll show you an example of a ray (れい) gun."
Why is the leader of the yakuza showing you examples of weapons, not to mention weapons that aren't real, like ray guns?