A very similar logic leads people to conclude "it was cold last week, so global warming is nonsense". Being able to understand the scientific case for climate change requires a level of scientific literacy and critical thinking that most people could readily develop, but isn't taught in schools.
Multicellular organisms have internal mechanisms to track environmental changes and forecast things like how many offspring to have.
This sort of "thinking" isn't neurological, it takes place in epigenetic systems that can span generations, especially in mammals due to gestation.
For example, we all know we are going to die at some point. It is inevitable, and nothing we do is going to prevent us from eventually dying. Because there is nothing we can do, it makes sense for us to ignore the problem, and possibly even to delude ourselves that we will live forever. There is no cost, since we are going to die eventually no matter what we tell ourselves.
However, with climate change, there ARE steps we can take today to prevent the catastrophe. Therefore, there is no rationalization for ignoring the problem.
I know human brains don't work rationally, though, but I thought it was useful to make the distinction.
> The same word, and also abnegation (German: Verneinung), is used for a psychological defense mechanism postulated by psychoanalyst Sigmund Freud, in which a person is faced with a fact that is too uncomfortable to accept and rejects it instead, insisting that it is not true despite what may be overwhelming evidence.
https://en.wikipedia.org/wiki/Denial
BTW, I think human brains do work rationally to the extent that the world is rational, because they are evolved organs. But human personalities or minds are not necessarily consciously deliberately rational. Like how computers must use physics on the hardware level but can be programmed to model impossible physics in a simulated virtual world.
But in the case of climate change anyone over thirty-five or so knows damn well the weather has gone funny.
People are scared, way deep down where it's hard to think about, because they know on a cellular billion-year-old level that you cannot escape the weather.
Once you grasp that, climate denialism is an obvious coping mechanism to prevent mass blind panic. It is a terrible thing to face the destruction of all that you love.
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In any event, deepfakes are a shocking thing to have to deal with and we are sooooo unprepared. The only thing I can think of is to spread the word about it far and wide and hope for the best (meaning hopefully people and society will "innoculate" themselves against the onslaught of concrete dreams.)