You would at least skim over the whole thing without being distracted by snippets or phrases you don't understand. That's the whole point: you need the ability

You would at least skim over the whole thing without being distracted by snippets or phrases you don't understand. That's the whole point: you need the ability to have temporary placeholders for concepts you don't know and continue learning. You cannot expect that everything you learn will be arranged in a fashion such that every new concept only mentions already known concepts.