For example, my perception is externalized whilst my judgement internalized. I'm good at observing and taking in new information and internally processing it.
My ISTJ friend is the opposite. His judgement is externalized and his perception internalized. So he's good at gathering existing information and processing it clearly and lucidly, externally.
This means I'm good at seeing what's wrong with my utility bill, but I need his help to sort out my facts and arrange them in a clear way to prove my case to the utility company.
Anyone else got any real life examples of this?