  Amplitudes are the major logical object in Quantum Theory. Despite this fact
they presents no physical reality and in consequence only observables can be
experimetally checked. We discuss the possibility of a theory of Quantum
Probabilities capable of give full account to quantum phenomena. Advanteges of
this formulation are the evidence of physical processes not described by the
orotodox formulation using amplitudes and the possibility of a full
algoritimization of Quantum Mechanics.
