The Boundary Conditions - An Anthropic argument.

The universe could be:

1. low-entropy (ordered) at both ends

2. low-entropy at one end and high-entropy at the other

3. high-entropy (disordered) at both ends

In options 1 and 3, the entropy is the same at both ends. It is true that entropy can change in these 2 senarios, it could increase and then decrease again or decrease and then increase, or oscillate madly, as long as the entropy at the boundary conditions is as described above. However, the boundary conditions in 1 and 3 above could be met with no change in entropy over time at all. ie the universe could always be high entropy or always be high entropy. Therefore, there could be no entropy gradient.

Now, it is argued that an entropy gradient es essential for the development of life.

The 2nd option is the only one where there is a garenteed change in entropy, therefore, in this option, there must be some entropy gradient.

Can we use an anthropic view to argue that since we are living beings, we must be on an enthropy gradient, and thus the MOST LIKELY option is 2, as this is the only option which guarentees an entropy gradient??

I realise that this does not rule out 1 and 3. Does it present option 2 as more plausible?

kathryn u 4845956

I think this is a VERY good argument. Maybe not completely conclusive (as you realise) but really clever.

Jason