I constantly see references to the "strong CP problem" which is basically just the fact that the CP asymmetries in the SM are not large enough to account for the observed CP asymmetry in the universe. What I find odd is that nobody ever mentions the HUGE CP asymmetry caused by our current cosmological model! Since CPT is presumed to be a true symmetry of nature (related to Lorentz invariance), T asymmetries and CP asymmetries are equivalent! The Big Bang, the idea that the universe had some initial time t=0 and is moving FORWARD through time (i.e. entropy increases), presents a nearly complete breaking of T symmetry on large scales. Why is this not generally considered as the source of the observed CP asymmetry??