ID proponents like to claim that their theory is scientifically valid. And their number-one argument seems to be that the universe is "too complex" to have arisen on its own, and could only have come into existence through the conscious, deliberate actions of an intelligent agent. If that is so, then they necessarily acknowledge the following:

1. They have a scientifically sound definition of the complexity of the universe, including the units such a quantity would be measured in, and acknowledge that this quantity necessarily must be a constant and would remain unaffected by any grand-scale cosmological events, including star formation, star destruction, gamma ray bursts, etc.

2. They have a scientifically sound way to measure the complexity of the universe, have done so, and may express it as a numeric quantity, which I will refer to hereafter as C(u).

3. Using scientifically sound observations and mathematically sound calculations, they have determined a possible value for the complexity of the universe, which I will refer to hereafter as K(c), such that K(c) is a positive real number, and that any conceivable universe whose C(u) is less than K(c) may have arisen on its own, independent of the actions of a designer, and that any conceivable universe whose C(u) equals or exceeds K(c) may only have arisen through the actions of a designer.

4. They have determined that the C(u) of our universe does in fact equal or exceed K(c).

5. They acknowledge that, should conditions 1-4 imply the existence of such a designer, that this entity must itself must have a complexity value, which I will refer to hereafter as C(d), that exceeds the complexity value of the universe, C(u). If this entity was not more complex than the universe, it would not have been able to design the universe.

6. They either...
1) Acknowledge that this designer, due to its level of complexity, must itself have been designed by an even more complex entity, or...
2) Have a scientifically sound explanation for why this designer could have come into existence without being designed, even though it is more complex than the universe, and the universe is already so complex that it must have been designed.

7. They have a scientifically sound explanation for how, when, where and why the designer could have existed before space, time and matter as we know them existed.

8. They acknowledge that simply being aware of the existence of this designer does not give us any information about its nature, other than that its C(d) > C(u). They further acknowledge that no concept of this entity that humans have, ever have had, ever will have, or ever could have, may be accurate, and that its nature may very likely be unlike anything humans have imagined.