Character name: Julian Keller Deduction limit: Nothing really, he'd only be secretive about certain things (like family, friends etc). Even if Sherlock deduces something he's secretive about though, it's still fine...though depending on what it is, Julian might react badly to it. Fourth walling or no: Julian wouldn't be a reader so he wouldn't know any real details about either Sherlock or the original Holmes. The most he'd know is the name, from movies and the like. The most he'd probably say is '...the real Sherlock Holmes?' or something like that.
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Deduction limit: Nothing really, he'd only be secretive about certain things (like family, friends etc). Even if Sherlock deduces something he's secretive about though, it's still fine...though depending on what it is, Julian might react badly to it.
Fourth walling or no: Julian wouldn't be a reader so he wouldn't know any real details about either Sherlock or the original Holmes. The most he'd know is the name, from movies and the like. The most he'd probably say is '...the real Sherlock Holmes?' or something like that.