Scrum (rugby) the players who are designated forwards binding together in three rows. The scrum then 'engages' with the opposition team so that the players' heads are interlocked with those of the other side's front row. In rugby union the initiation of the process is verbally coordinated by the referee who calls 'crouch, bind, set' as of 2013 (formerly 'crouch, touch, pause, engage', 'crouch and hold, engage' before 2007). The scrum-half from the team that did not infringe then throws the ball into the tunnel created in the space between the two sets of front rowers' legs. Both teams may then try
Double bind (which would dissolve his own head), and starve if he did not. Alice suggests that this must happen quite often, to which the gnat replies "it always happens". The pressures that drive evolution therefore represent a genuine double bind. And there is truly no escape: "It always happens." No species can escape natural selection, including our own. Bateson suggested that all evolution is driven by the double bind, whenever circumstances change: If any environment becomes toxic to any species, that species will die out unless it transforms into another species, in which case, the species becomes extinct anyway. Most significant