You remind me of my ISTP best/f. I used to constantly need to confirm where she was coming from as she'd be unclear or begin a new topic of discussion without warning while we were discussing someone or something else. Or she won't clarify or give reference but expect me to know what she means.my apologies for being unclear about this... i was giving my input on the matter, not arguing against giving someone practical aid. i often quote the sentence that got me thinking about something, that's where my ideas tie into the discussion.
Even though I *knew* and still *know* where she was coming from or that she just borrowed from something which got her t(h)inking or what she means, I sometimes remind her "Clarify!" But mostly I don't bother because I know how she flows and as long as I can follow along, it's good. She's learned to be more clear with me too. But I'll remind her with others or I'll inform others when they looked puzzled. LOL She's so much fun though! Esp. when she breaks social norms or doesn't care how crass she is or insensitive when she questions something or someone... though defending or explaining for her or TO her can be a pain
I dread the "Why?" which she mostly uses to tease me...and then I tease her with "Because." "Why?" and then I (teasingly) go into a long droning which she'll then tell me to "STFU, I get it! I know!"