I understand the limitations when applied to the Christian faith, but still think that religion as a whole could be reasonable example. Take for example Christianity, as its what I understand most. There are 2 main divisions of Christianity - Catholic and Protistant, but within each category, there are many denominations, and still further, within the denominations there are different churches, with different worship styles, and within those churches there different study or activity groups, and even on an individual level, 2 people will not have an identical understanding and application of their faith! So saying 'I'm a Christian' is about as helpful as saying 'I'm a mammal!' but to reverse it, none of thse statements are untrue, it is only the discontinuous mind that insists on these limitless categories!