I didn't offer a definition of OCD. I offered a very loose definition of crackpotism, which may share some characteristics of OCD. OCD can be expressed in a variety of ways, including those in your referenced definition, but certainly not limited to them. One that fits the profile is the obsessive need to impose very precise conditions of order in the form of symmetrical and/or rhythmic physical arrangements in their environments. I was simply wondering whether obsessive attachment to an idea might be included as a potential indicator of other OCD tendencies; a need to impose order on the Universe in their own terms.

__________________
Time is a great teacher, but unfortunately, it kills all its pupils. Hector Berlioz

"To complete the picture all the photons can be seen to be synchronising friction on and off throughout the overall cone which itself is synchronised to the equal and opposite reaction of equilateral triangulation"... by a scientificator in ATM, too priceless to be lost to posterity.