What is 1816?
The "Year Without a Summer," in which a massive volcanic eruption in Indonesia injected a huge amount of smoke and ash into the atmosphere, creating a layer that blocked out sunlight and lowered temperatures worldwide.
Now here's my point: the conditions were JUST like those predicted in a "nuclear winter." And yet we're still here. The fact that we survived the "Year Without a Summer" disproves the idea that a nuclear winter would be the humanity-killing event the alarmists say it will.
Crazy Guy: "AAAAAHHHHH1" THE NUCLEAR WAR HAS ENDED! NOW A NUCLEAR WINTER'S GONNA COME AND KILL ALL THE SURVIVORS!
Me: Uh, excuse me, but didn't a volcano erupt in 1816 and produce nuclear winter-like conditions?
Crazy Guy: Uh, yes.
Me: And mankind is still here to remember it, right?
Crazy Guy: Yes again.
Me: OK, so what makes you think a nuclear winter will be any different?