You must make an overly strong assumption about the coin and toss to say that. Here we don't see the toss, nor are we able to subject to coin to any scrunity -- just the result of the toss. Fifty heads in a row means the coin or toss is rigged -- almost a complete certainty.
The only assumption is that the tosses are random in result and not biased or controlled by ID!
Assuming randomness, what is the probability of obtaining the following sequence?
HTHTH HTHTH HTHTH HTHTH HTHTH HTHTH HTHTH HTHTH HTHTH HTHTH
I just tossed the following sequence. What is the probability (You can provide the formula if you like):
HTTHT THHTT TTTHH HTTTH HTHTH THTHT TTTTH HTTTT HTTHH TTTHH
You are missing the point. Any predefind series is equally likely or unlikely. When creationists assert that the outcomes of evolution are unlikely, they are predefining a specific series.
The important point is that the series that led to current life forms is not the only series possible. There is nothing in biology that predicts, in advance, the occurrance of any particular structure or trait.