Perhaps this has been pointed out before, and is probably self-evident to many. But it seems like it would be a common fallacy to assume (I've caught myself trying to do it on occasion) that if someone is highly intelligent they must be a Logical type, or if someone is a Logical type they must be intelligent.
Don't be fooled!
Intelligence and Logic are entirely separate. It is possible to be very intelligent and to be an Ethical type. It is also possible to be a Logical type and also stupid.