Is the Second Law of Thermodynamics correct or not?
Not a question easily answered.
If you are talking in terms of a scientific answer, the answer is, "We don't know." The
sine qua non of science is tentativity. There is no hypothesis, theory, law, or any other description of the natural world is that considered to be THE TRUTH. It's all subject to being amended, modified, or even completely discarded, in the face of new evidence or a new hypothesis, theory or law that explain things better. It's possible that the 2LoT is an accurate description of entropy in closed systems. It's also possible that tomorrow someone will conduct an experiment or make an observation in the real world that brings the 2LoT crashing down about our ears.
Given that beginning understanding, the next best answer is that the 2LoT is the currently accepted, best description of entropy in a closed system.
Now, I'm going to go out on a limb and assume that you think the 2LoT represents some sort of problem for the ToE. Here's why it's not.
The 2LoT says
quote:
The total entropy of any isolated thermodynamic system tends to increase over time, approaching a maximum value.
Here are two reasons why the 2LoT doesn't have any effect on the ToE in the least.
1. The earth isn't an "isolated thermodynamic system." It gets considerable energy from the sun.
2. The 2LoT says that total entropy increases. It doesn't rule out the possibility that there are areas within the system where entropy decreases.
Those who would sacrifice an essential liberty for a temporary security will lose both, and deserve neither. -- Benjamin Franklin
We see monsters where science shows us windmills. -- Phat