Flexibility may be the value of the human brain, but the inconsistencies that the brain creates can be a nuisance when trying to predict. Problems with predictions occur because the quality of information is only one factor among the many that influence what people with a cognitive disability can, will and may do. Their effects are discussed throughout the Allen App. The point of putting them here is a convenient list to remind you to consider the common confounding factors. In no way should anyone think that this list includes everything.
Additions are welcome as long as they are common versus rare. Too many rare factors would be useless. Ultimately, human beings are full of surprises, and occupational therapists will have to use clinical reasoning when they are asked to predict.