David's comment: I'm sure this mutation was very important but look at the bolded comment above. Always overoptimistic. It undoubtedly required more than just this. > > dhw: And they have said so (“which was not solely responsible...”). Nevertheless, the pattern they are drawing attention to is that of individual cells communicating and collaborating. You will no doubt say it was all preprogrammed, but communication and collaboration are acts that suggest autonomous decision-making. Just another piece in the jigsaw that makes up the intelligent cell!-Same issue. I think the cells carry instructions to cooperate.