Is our universe unique?

Is there any other universe like ours?

The Davies Hypothesis suggests that dual universes emerge from an absolute nothingness called the Pleroma according to the equality: 

P = 0 =  f [ (±x)² + (±ix)²] where 'i' is the square root of minus one.

Here we have nothing composed of something, two seemingly positive terms cancelling each other out. but how do we get a universe? The 'x' could refer to anything; a cabbage for example, but this is very unlikely to result in a viable universe.

 I suggest that 'x' represents the very ingredients and recipe for making a viable (dual) universe including all the laws of nature we observe? Although there are endless possibilities, the pleroma is eternal and infinite, very few result in a successful, viable universe suggesting that perhaps ours is a unique solution, making us, as witnesses, very special indeed.

If it is a unique combination of physical constants then other viable universes would be made of the same elements as ours, obey the same rules of nature, etc, but evolution may have followed a completely different path, possibly rendering such a universe as unrecognisable. 

I suggest that because ‘x’ is possibly the same in all viable (dual) universes, impingement and coalescence may occur. One can infer from that that in some far off reaches of our universe, too far to be identified, there may be vestiges of a totally alien world including life.