The measure of an evolved man is how quickly karma returns. When the time between cause and effect becomes very short, you must be very careful. If you seem to be getting away with murder, you are very far from life's goal. In order to understand anything, you must be on at least the same level as what your are attempting to stand beneath. They may sound reasonable and may even provide a modicum of comfort, but in the end only Reality rules.
Some scientists actually believe both theories and some, neither.
Only a few scientists have experienced Reality. It is unchanging. Most humans live from their heart down. A few from the heart up. The heart is the only area these two have in common.