If your document is not in clear, precise language, then it can and will be re-interpreted by everyone who reads it. This can be vital for fiction or poetry, where the purpose is to engage the reader's imagination and create a full, vivid world with as little text as possible. But if there is no "right", then the interpretations are usually destined to be "wrong" because of the ambiguities. This is part of every language, including spoken English, written English, contracts, legal text, programming, and mathematics. If you do not have a well defined structure, you cannot define or handle exceptions.
One classic version of such ambiguity is dates. When you write "01/02/03", to You mean January 2nd, 2003, as Americans do? Or Febuaryy first, as the UK and some European nations do? Or do you follow the German convention, and mean the year February 2nd of 2001?
This kind of confusion is why we have "formal" English, so people can write 2001-02-03 and make it unambiguous, and so that speakers separated by age, time, or local history can communicate consistently. It's quite vital to a worldwide economy and political ecology, and it is _critical_ in engineering and computer science.