Lie

You know the feeling: you have a hard time recalling the name of someone you know – in many case, an old acquaintance.

You appear to have recalled someone's face or voice, but not the name. You have to admit having a lousy retrieval system for name. The older you grow, the worse the system will be.

One way to train myself is reading novels with more characters. I don't know your manageable number of characters without the need of a cast spreadsheet. I recently read a novel, First Lie Wins, in which the central character operates under multiple aliases. That gives me the challenging experience of not mixing up Lucca Marino, Evie Porter, Izzy Williams, Regina Hale, Wendy Wallace, and Mia Bianchi. Those are simply different names of one protagonist. 

If I wish to tell you a lie, I would pretend that I didn't get confused with these names.