Surprisingly, even some biblical creationists have claimed that God could have created in a different manner to that which he [told us that he] did. For instance, they say, he could have created in 6 seconds or 6 billion years, if he had wanted to (or instantly, as Augustine averred). This goes alongside the claim that God could have ‘used’ evolution as the means of his creation, which often prepares the way for accepting that he did use evolution (contrary to the direct reading of Genesis 1, and elucidated by Ps 33:9, John 1:3, Hebrews 1:2 and Hebrews 11:3, for instance)!
But, what are we saying here? Are we recognising that God doesn’t act arbitrarily, or capriciously, but that his actions reveal who he is, as Paul teaches in Romans 1:20. Does not the claim above attribute to God, not the glory of the one who is, but the inglory of who he is not, or worse, that of pagan ‘fates’ or ‘spirits’ who in the relevant literature are unpredictable, capricious and have no discernable selfhood or nature?
There are two answers to the question, I think:
Firstly, on the basis of the argument above, the answer is “No, God could not have created in any old way, because he is not a magician who does tricks, but is the almighty creator whose actions, will and nature are unified: he only does what is of him to do, what represents who he is". This is the import of my reference to Romans 1:20. If we say that God didn’t create as he has revealed, as is his nature, representing who he is, but we set that aside and say that he did, or could in principle, create in another way, then we are talking about another identity, not the God of the Bible, the creator of all that is. As Kurt Wise said in a conference address in about 2000, if we say that God created in a way other than he reveals to us, then we are talking about another god! This amounts to backing into blasphemy: not saying that something of the Holy Spirit is not of the Holy Spirit, but that the Holy Spirit could be other than he is!
The second answer is that to suppose alternative creative possibilities is idle speculation and doesn’t get us anywhere. One could also speculate that God could not have created at all; then where would we be? Not that creating was necessary, but that it was what God chose to do as an act in line with his will; entirely and thoroughly in line with his will, which is in line with his nature. The point is that the only information we have about his creating is what is in the Bible, to want to set this aside and claim that could be alternatives is completely pointless, unless, of course, one wants to open the way to set aside the revelation and claim that it is about something other than what it depicts. That then is a different story and relies on what is not said, not on what is said. This still gets us nowhere, because everything that is not said is available for reference: then why have words at all, if their meaning can be negated so easily?
The god who could have created differently is, I suggest, another god: he is not the one whose invisible attributes are revealed in his creation, but one who is otherwise: uninvolved, dis-related, not in relationship, or one who is by his nature love. So could God have created in a way different to that which he did? All I can say, is, 'not this God' you have to think up another god whose invisible attributes are different to the one who reveals himself in the Bible and in creation.