This week, as he roars out of Texas with so much money and momentum behind him that people can't agree on whether this is the campaign's beginning or its end, the best way to grasp what has happened may be to imagine that both stories are true.
Most important, they can't read the 3 billion letters--A, C, T and G, for the nucleotides adenine, cytosine, thymine and guanine--in the human genome from beginningtoend, the way one reads a book.