Even though the sun has risen in the east(ish) every single day that any of us have been alive, and every day that our ancestors were alive, that does not constitute proof that it will rise in the east(ish) tomorrow. The balance of probabilities, based on our knowledge, experience, written and verbal records (aka evidence) is that tomorrow the sun will rise in the east(ish).
So even if you think it's a fact that the sun rises in the east(ish), and will therefore will rise in the east(ish) tomorrow, that isn't a given.
Likewise, you cannot prove negative existence. That means that you could say there are no green crows. However, you cannot prove that there has never bee a green crow in the whole history of the world, ever, anywhere in the world, because you simply don't know. All you can do is assume that because there are no records or even hearsay that someone has seen a green crow, that green crows don't exist.
Mind you, I went to Tibet and behind a large rock I saw what I thought was a green crow. I threw myself upon it in an effort to capture it, but failed, rolled a long way down the mountain and broke every bone in my body. I shan't be trying to prove my old science teacher wrong again, I tell you.
So you see, there are facts, there are assumptions made from observation and then there is opinion. Your opinion is that Adrian is a great actor and all round great guy...