"If you drop a truck from 50 feet on a group of people, and two managed to survive, it doesn't mean they became more resistant to a truck falling on their heads."
I reckon if you'd repeat that experiment a gazillion times, which is what evolution is about, that you would end up with some pretty good truck dodgers.
Not sure if these corrections are needed, maybe it was just sloppy wording, but here they are nonetheless:
Depends on why they survived I guess. If they lived because they happened to have particularly thick skulls and managed to pass it on to their children, you could indeed argue that overuse of truck dropping can lead to resistance in the human population.
And even in the real case of bacterial resistance it isn't that they (the individual bacteria)actually become more resistant; they were already resistant and now they have the opportunity to pass on their genes to a much larger fraction of the population, changing the gene ratios significantly. By definition that is evolution.
"If you drop a truck from 50 feet on a group of people, and two managed to survive, it doesn't mean they became more resistant to a truck falling on their heads."