I think there is even some confusion here about the kinds of questions that science is able to answer. We actually don't use science to answer questions like "is the universe finite or infinite", we just use it to address questions like "is the universe finite." The answer to that question is, "we have no scientific evidence that the universe is finite." That's it, that's all we can use science to say. This is not evidence that the universe is infinite, such a thing is not likely to even be possible to obtain. Since absence of evidence is not evidence of absence, we simply cannot use science to say anything at all about whether or not the universe is finite in size (in comoving coordinates, etc.), we can only say we have no evidence that it is finite. Why must we always try to use science for more than it is intended or appropriate