Well, that depends on the human reaction. Think of screaming "fire" in a movie theatre. Panicked rush out, egregious disregard for human life and safety for the sake of self-preservation. Consider our theatre patrons are armed, guns, knives, nuclear weapons, economic warfare. I'm not saying there is necessarily going to be world destruction, but it isn't-not on the menu.

> That Earth will be uninhabitable within the lifetime of a person alive today?

For people in Africa threatened by heat and drought (which is already making places uninhabitable and causing migration!) and smaller islands, yes.

How many climate predictions have been correct? How many predictions in general have, a posteriori been right? This is multivariate, not necessarily a question of the effects of climate itself, but every conceivable effect in a long chain, including further human intervention and non-linearities in global climate behavior that are yet-to-be observed and no doubt a lengthy slew of other factors. But we're not allowed to talk about speculation, right?

This is simply not accurate. There might be certain areas that are more impacted than others, like the Maldives, but there is no reasonable interpretation of "uninhabitable" any scientist would attribute to Africa, let alone Earth entirely.

"places" uninhabitable is not the same as the planet being uninhabitable, as the parent post claimed. Parts of the planet have been uninhabitable for ages.