The Raven Paradox - Can anyone explain this in layman's terms?

I would say the weaker, more appropriate phrasing would be “All our observations suggest that charges tended to act like this…”, since the entirety of the premise is thus reduced to the exact data used to support it.

That still leaves the underlying assumption that there is a consistensy, that we can predict unknown results from known. That’d be filled with data about the apparent unchanging nature of physical laws (though i’m no scientists myself, so I wouldn’t know what they’d be). You still end up with that assumption though that in general that which hasn’t been observed will tend to match up with what has been, to a greater or lesser extent depending on the uniformity of results. And that’s just that, an assumption.