A very rough first try of a philosophical argument for...

...I'm not sure what:

1. In a rational world (state of affairs?), the future would resemble the past.

2. However, there is nothing contradictory about a world where the future does not resemble the past.

3. The number of ways that the future would not resemble the past far outnumber the ways that it would resemble the past.

4. Therefore, it is very improbable that the future would resemble the past.

5. Therefore, we should not expect the future to resemble the past, unless it had a rational cause.

6. Therefore, our expectation that the future would resemble the past only makes sense if we believe that it has a rational cause.