You fail to notice important thing about socionics. This system is highly speculative and unscientific. Model A is an artificial structure made to resemble individual differences in information processing. It can't be considered a fact because of this but it also means that other people can modify this theory to make it more fitting to reality, that's why other models and subtype systems developed. If you need a reliable system to stick to it I recommend neuroscience for cognitive side of human differences and big 5 for behavioral.