No, he's saying that if the idea was viable it would probably have come to fruition within more than 60 years of research we apparently had time to do on it.
I disagree, it probably wouldn't, unless it was something very simple.
60 years is nothing. In the next 6000 years most things u can barely dream off will be ancient history.
If in last 60 years we didn't discovered something it doesn't mean in the next 600 we won't discovery something 10 times as good as it.
If you are not the author you are as narrow minded as him.
This means that the article's author is very narrow minded.
He's logic: We use fixed-wing aircraft today, so there is nothing we could discover tomorrow that would make us shift from fixed-wing to disc shape.
Why do people think they know it all? Or why do people think that today's knowledge will be true tomorrow?
Because this is the 16th century and we know the Geocentric model is true?