but if we're associating logical consistency (the ability to be logically consistent, the ability to point out others' logical inconsistencies) with Ti, and if Ti is valued (which it would be if it were in the creative position), then it seems like logical consistency would be something an SLE would, in fact, give a damn about. and if Ti really does have to do with logical consistency, then a type with strong Ti would be better than a type with weak Ti at pointing out others' logical inconsistencies, which was my original point.
as far as I know, a SLE's logic is dependent on their Se. I kinda think all functions are subordinate to one's goals; if you have a source that says otherwise, I'd be interested to see it, as I don't know much about rationality/irrationality. I'm not sure that all irrational types are inconsistent in their behavior -- I suspect I'm an ENFP, and I can be counted on to exhibit quite a few behaviors.