when you ask someone a question and they just don't answer you at all

You ask your roommate if he ate your yogurt. He looks directly at you, nods slowly like you've just told him his childhood dog has passed away, and then turns back to his phone. Three hours later he texts the group chat a meme. The yogurt question remains suspended in the universe, unanswered, like a ghost that will haunt you every time you open the fridge.
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When you ask someone a simple question and they just stare at you without answering.

You ask your colleague if he's seen your stapler. He stares. You wait. You check if he's breathing. Eventually you realize he's not ignoring you—he's downloading the answer from somewhere deep in his hard drive, and you've accidentally made eye contact during his loading screen. You leave before he finishes buffering.