Hey @facebook why can't I search my friends/other peoples' friends anymore? 
Hi Jessica. Learn how to share your feedback regarding searching within your Friends list in our Help Center: http://bit.ly/2CPGamZ . -KN
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Yeah, it's really f'up. That's my feedback. Obviously if you're preventing people from searching for a specific friend from their own list, it's a travesty.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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