Is they saying "It s not volts that kills, it s amps" true?

According to the saying, low amperage will not kill someone, it s the high amps that will. Well since amps is derived from watts divided by volts, then in theory 0.0001 watts at 0.0000000001 volts will equal 1000000 amps, which in theory, should instantly kill a person. But will that really kill someone?
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