Overall, these reports are mere speculation.

总体来看，这些报道更多的是猜测。

I must emphasize that these ideas are NOT mere speculation. We know they can work.

我必须强调指出，这些想法不仅是单纯的设想，它们确实是行之有效的。

The thoughts that God has created other worlds and may be creating them today is mere speculation.

有人说，神还创造了其它世界，而且今天可能仍在创造。