Let's say there were originally 10 black ravens, and you concluded that every new raven would Not be black, you would be wrong upto the point of there being 1,000 ravens(990 after the original 10 or 990 times you were wrong). To continue concluding that the next raven would Not be black would mean that you're insane in Einstein's definition of the word.
It's overwhelmingly logical and rational to estimate that the 1001th raven would be black, given that the previous 1000 were.
However, there is still a chance that the 1001 raven would Not be black, though the odds are 1000 to 1.
the idea is that you cannot conclude (in terms of theoretical logic) from observations - let us not get it too far. but it is important to see the difference to a set of assumptions that says george is a raven; all ravens are black, george is black.
Like Zeno's Arrow Paradox, Hume's strong skepticism is a fun party trick, if you happen to be a sophomore studying philosophy.
But Quine's conformational holism fixed that problem with empiricism, just as Newton's calculus did away with the Arrow Paradox.
Would you like to know more? See
http://en.wikipedia.org/wiki/Two_Dogmas_of_Empiricism#Quine.27s_holism for details.
Anyway, let's stop bickering over digressions and focus on what's important: celebrating the fall of House Darkcoin and Monero's ascendance to the Altcoin Throne as Queen to King Bitcoin.