
It's become something of an online ritual; almost a religious rite. Creationists come bursting into a debate group and announce confidently that evolution has never been observed and then they get given several examples of observed instances of evolution. Then they declare that that wasn't evolution and insist evolution is something unrecognisable as the scientific theory of evolution or the observable phenomenon the theory seeks to explain.
It's the equivalent ofsomeone posing as an expert on geometry and claiming there is no such thing as a circle, then, when shown a circle, declaring that a real circle should have a circumference to radius ratio of exactly 3 because the Bible says so.