"Theorem" is better term for ID than "theory"
-- Pontius Pilate
The Merriam-Webster online dictionary's definition of the scientific meaning of the word "theory" is:
a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena (emphasis added)
The use of the word "theory" to describe Intelligent Design has always irked me because a scientific theory is supposed to explain something whereas ID does not explain anything -- it is just a criticism of evolution theory.
On the other hand, one of Merriam-Webster's definitions of "theorem" is:
an idea accepted or proposed as a demonstrable truth often as a part of a general theory : PROPOSITION (emphasis added)
The term "demonstrable truth" might cause a problem for some people because it may be impossible to prove the truth of ID with certainty. However, an acceptable level of truth is sometimes not certainty -- for example, courts accept positive DNA test results even though DNA testing labs say that there is one chance in a few billion that two DNA samples that appear to come from the same person actually come from two unrelated people.
So from now on, whenever appropriate, I am going to use the name "theorem of Intelligent Design." I have already started to apply the word "theorem" to criticism of co-evolution theory (e.g., "Fundamental Theorem of Co-evolution of Total Co-dependence of Two Organisms").