 The philosophical implications of the work initiated by Solomonoff, Kolmogorov and Chaitin in the sixties of the 20-th century are fundamental and diverse. The universal distribution m proposed by Solomonoff, for instance, codifies all possible mathematical knowledge and when updated on the basis of empirical observations would in principle converge to an optimal scientific model of our world. In this sense the choice of a universal Turing machine as basis for our theory of information measurement has philosophical importance, specifically for methodology of science. A choice for a universal Turing machine can be seen as a choice of a set of bias for our methodology. There are roughly two schools: