Does this sentence sound natural "This document assumes that you are already familiar with the..." ?

[Zoli]

This document assumes that you are already familiar with the International Phonetic Alphabet (IPA) and that you have a basic knowledge of English phonetics.

 

[Rover_KE]

It’s fine.

 

[Tarheel]

I find it a bit strange. Why? A document can't assume anything. Also, either you are familiar with IPA or you are not. (I'm not.)

 

[Skrej]

It's fine, but you also sometimes see the same idea expressed without the personal pronouns.

This document assumes familiarity with the International Phonetic Alphabet (IPA) and a basic knowledge of English phonetics.

It's not necessarily any better, just another way to express the same idea.

 

[tedmc]

Or

This document assumes the reader to be familiar with the International Phonetic Alphabet (IPA) and possesses a basic knowledge of English phonetics.