Theorizing about nuclear winter is somewhat similar, in the sense of being inaccessible to experiment. Does that mean we should disregard the possibility of nuclear winter?
As with using the Orion drive for launch and landing on Erth is possible, test nuclear winter is certainly possible. But as with the former, you won't be very popular among the survivors (if any).
Being a prophet is probably great until you suddenly find yourself building a fortified compound in Waco, Texas and purchasing black market full auto machine guns.
Thank you for contacting Gunmetal Ranch, a legitimate 501(c). If your call is related to the class-action "most dangerous game" settlement, please hold for a cowpoke.
Its not everyone building crystal palaces in their mind, they're all building fortresses. And they can't be wrong in their fortress or it breaks their world view which they cannot accept.