The pope can't or won't say no, yes, yes, yes and yes or yes, no, no, no, no. Why not?

And how can one adhere to Veritatis Splendor, (encyclical, still binding) and the Kasperian reading of AL (exhortation) without violating the principle of non-contradiction. The binding teaching under anathema from the Council of Trent that God's commands are not impossible and that He gives us grace to do them?