The constructs are real, yes. But not necessarily the things to which the constructs refer.
You’re getting way off-topic here anyway.
What we’re saying is that you have another “way of seeing” then you need to justify it as a system that can in some way discern false claims from true ones.
I mean, look at BwanaBob’s example:
The problem is, Bob, that you are assuming that, because there ARE such things as radio waves, you were eventually proven right. But actually, it doesn’t work like that at all. The actual truth of falsity of the assertion is not what makes something knowledge: it is having REASONS to show that a certain claim is true or false. Anyone can make assertions, and some assertions will turn out to be right. But that doesn’t retroactively justify the assertions.
Here’s a little scenario to illustrate:
You put a gun to your head, and ask me whether there are any bullets in the gun.
I say, no, I know for a fact that there are not.
Believing me, you pull the trigger, and nothing happens: there were no bullets in the gun.
But, as it turns out, I didn’t actually know whether or not there were bullets in the gun. So I was lying when I said that I knew there weren’t any bullets in the gun, and the fact that there weren’t any doesn’t at all absolve me of that lie.
Likewise, there are a gazillion loonies out there suggesting all sorts of theories about all sorts of things. The vast majority are likely very very wrong. But, purely by chance, one or two might be right. However, they had no actual KNOWLEDGE demonstrating that they were right, and that makes their claims just as worthless as when we didn’t know they were correct. ANYONE can make claims: that’s pathetically easy. The really really hard part, the real work, is finding ways to establish the truth of those claims.
As Michael Shermer once pointed out, the argument “you can laugh at me, but remember: they laughed at Einstein and Newton once” is a rather poor one to “prove” one’s genius. People also laughed at the Marx Brothers. And when you look back through the history of claims, there were always way way more people that were wrong than were right.