You might argue that intelligent design is in fact a scientific method although to date only widely recognized as theoretical or might i say logical.
This has already been covered, ad naseum, in this thread. ID fails to meet the criteria to be a scientific theory, and therefore is not scientific in any form. In brief:
To be a thoery, you must:
1) Be based on all previously existing data
2) Be testable, meaning you can use the thoery to design experiments to test the thoery
3) Be predictive, meaning the thoery accuratly predicts the results of of the experiments from #2, and finally
4) Is falsifiable, meaning if its wrong you can prove its wrong.
ID fails at all four levels:
1) ID requires that a great deal of current knowledge be ignored
2) ID does not generate any hypothesis which we can test. And until someone invents a god-o-meter, it'll remain that way.
3) Since ID cannot do #2, #3 is obviously impossible
4) ID is inherently unfalsifiable; no matter what result you get, you say "god did it", and bam - fits the "thoey"
If humans can create things, I would argue that creationism exists. We have created many things although none of it from absolutely nothing.
And since life wasn't created from nothing, but rather arose from pre-existing chemicals with a propensity towards self-polymerization, the above point is irrelevant.
If we accept the premise that in order for things to be - they must be created (at least in some manner) either by God or mechanism, and if we argue scientifically for mechanism, then it must have taken someone or something to move the mechanism... much like a watchmaker winds the watch hand.
So someone had to move the planets into orbit? Strange, considering that both the formation of planets, as well as their orbits, are the expected outcome of having a little force called "gravity".
Same goes for abiogenesis and evolution; both occur requiring nothing more than the forces of nature.
The absence of any other scientific explanation for the big bang theory
What do you mean by "any other"? As in an explanation which would fit your religious dogma?
Science explains those events quite nicely, and in the case of evolution and abiogenesis even explains why they would happen. The big bang is still a bit of an open case, largely stemming from the fact that current scientific instrumentations does not allow us to probe singularities.
In scientific reasoning, absent any other proof, this is the reigning theory. For what else is there? Someone had to smash the atoms to get things going.
Absolutely wrong. An absence of evidence for "first cause" does not automatically indicate a god. The correct, scientific answer, is "we don't know".
X is too complex, orderly, adaptive, apparently purposeful, or beautiful to have occurred randomly or accidentally.
Neither evolution or abiogenesis are random or accidental, therefore your first premise is empirically proven to be incorrect.
Therefore, X must have been created by a sentient, intelligent, wise, or purposeful being.
And since your first premice was false, what does this say about your second premice; a premise which is 100% dependent on the first being true?
God is that sentient, intelligent, wise, or purposeful being.
Therefore, God exists.
Since your starting premise, upon which your entire argument rests, is known to be false, what does that say about the above point.
And while we're at it, since we see incredibly complex systems spontaneously forming all the time, what does that say about your above statements?
X usually stands for the universe, the evolutionary process, humankind, a given animal species, or a particular organ like the eye
OMG, you didn't just say "the eye", did you? Even the creationists valued "discovery institute" tells you guys not to use that example as it is known to be wrong...
Complexity implies a designer.
Complexity in no way, shape or form indicates a designer. Complex systems are observed to form all the time purely through nothing more than physical and chemical processes.
Likewise, complexity is purely a point-of-view. What seems complex to one seems simple to others.
Bryan