In practice, most Regexes fit on a line, and while not trivial to read, they don't involve a deep tree-like structure. Grammars, on the other hand, do, and ambi

In practice, most Regexes fit on a line, and while not trivial to read, they don't involve a deep tree-like structure. Grammars, on the other hand, do, and ambiguity can be very sublte.