When attempting to introduce non-rationalists to the ideas of cryonics or Strong AI, it appears that their primary objections tend to be rooted in the absurdity heuristic. They don't believe they inhabit a universe where such weird technologies could actually work. To deal with this, I thought it would be useful to have a cache of examples of technologies that have actually been implemented that did, or ideally, still do, challenge our intuitions about the way the universe works.
The first example that comes to my mind is computers in general; imagine what Ernest Rutherford, let alone Benjamin Franklin, would have thought of a machine that uses electricity to calculate, and do those calculations so fast that they can express nearly anything as calculations. Nothing we know about how the universe works says it shouldn't be possible, indeed it obviously is knowing what we do now, but imagine how weird this would have seemed back when we were just coming to grips with how electricity actually worked.
I suspect there may be better examples to challenge the intuitions of people who've grown up in an age where computers are commonplace though. So does anyone have any to volunteer?
But a cancer diagnosis means expensive treatment then more years of life, not near-certain death.
But there are fewer car accidents now (depending on where you are), and driverless cars might change that.
But there's much less crime now.
But revolutions spread like whoa now, because the media's fast.
Also, your scale is tiny. There were very few deaths by cancer when lifespans were short in the days before farming. There were no drunk drivers in 1800. There were no corrupt politicians in bands of < 150 people. There was no school for most people in 800. There were no 9-to-5 jobs in 1900 when we were all farmers. Long enough to explain a mistake, not to prove a point.
Yes, Yes, Yes and Yes...
(actually "Yes", "Yes", "Not in Russia", and "Yes, but they ruin countries in result")
... but normals just don't get that. The scale I gave an example of is a scale of many normal people I know. They don't appreciate antibiotics, phones and electricity -- they take it all for granted. Their life expectancy from 200 years ago is totally irrelevant to their everyday life.