It's the default premise in science: If you observe something in nature only once, you assume that what you've seen is typical. That's because 'typical' is just another way of saying 'most probable.'
Sentiment: NEGATIVE
Nevertheless, as is a frequent occurrence in science, a general hypothesis was constructed from a few specific instances of a phenomenon.
When I say 'rare,' it's my own term. It's like you're doing something with a photo that is dominant that no one has ever seen before. #Rare means that it can only be seen here. It's just a rare moment that I'm sharing with the world.
We cannot remember too often that when we observe nature, and especially the ordering of nature, it is always ourselves alone we are observing.
In things to be seen at once, much variety makes confusion, another vice of beauty. In things that are not seen at once, and have no respect one to another, great variety is commendable, provided this variety transgress not the rules of optics and geometry.
The very nature of science is discoveries, and the best of those discoveries are the ones you don't expect.
It is not once nor twice but times without number that the same ideas make their appearance in the world.
Chance doesn't mean meaningless randomness, but historical contingency. This happens rather than that, and that's the way that novelty, new things, come about.
Physics tells us observations can't be predicted absolutely. Rather, there's a range of possible observations each with a different probability.
Chance alone is at the source of all novelty, all creation in the biosphere.
Phenomenons only happen once in a lifetime.