In honor of RD Miksa's recent Crude Cosmological Argument which has nothing to do with yours truly, I've decided to give my own personal cosmological argument.
It is as follows:
It is possible the universe is designed.
The universe sure looks designed to me.
It's reasonable to believe the universe is designed.
And there you have it - the Crude Cosmological Argument, in all its simplicity. While I enjoy and have considerable confidence in all manner of other arguments - the Five Ways, etc - I have to admit, this is my standard cosmological argument, and the first one that comes to mind when I'm asked to present my reasoning for belief in design.
Now, obviously, there are some weaknesses to the CCA. It's not iron-clad, for one - this is not, like the Five Ways, a conclusion that one can arrive at with certainty given these or those premises. It's also very subjective - I appeal to my personal estimation of the universe, scientific knowledge and discovery, etc. Nor is it a very 'weaponizable' argument, since in principle someone could give the !CCA:
It is possible the universe is not designed.
The universe doesn't look designed to me.
It's reasonable to believe the universe is not designed.
All other things being equal, and with no other arguments at the ready, I can't very well dispute the !CCA. Which is fine, since I don't care to. Likewise, the !CCA proponent can't dispute the CCA, all things being equal. This results in a messy, unfortunate situation where (once again, not considering any other arguments, features of the universe, etc) two people holding distinct views are justified in their beliefs.
Rather, this is messy and unfortunate to a lot of people. Me? I don't particularly care. Life is messy, as is reason. People can disagree and still be reasonable.
Now, this isn't going to be a very useful argument to most people, but I think it contains an important point: you really, in my view, don't need more than the CCA to justifiably believe the universe is designed. Does the universe look designed? It does? Great, you've got your justification for belief in design immediately. If this upsets someone - if someone insists that no, I need a far more developed, airtight, powerful, must-rationally-compel argument in order to believe in cosmological design - I have a stock response: "Screw off, you pissant." I encourage you to make use of it.
Later, I'll give a more 'useful' version of the CCA - which I'll tentatively call the CCA+. But for now, consider the possibility that the universe seeming designed at a glance may really and truly be all you need to rationally accept the (admittedly, very broad, very open-ended, and potentially fallible) belief that the universe is designed.