Ivan Hoffman is a great source for legal interpretation –
“There is a maxim in the law business that vague and uncertain language in an agreement is to be interpreted against the party drafting the same. While that may be true in the limited context of a civil litigation or other formal legal proceeding, it is completely *untrue* in the more practical context called ‘real life.’ In ‘real life,’ vague and uncertain language is almost always interpreted *in favor* of the party drafting the same. If you are a writer, publisher, web designer, site owner, recording company or any other party dealing in or with agreements (which I presume is all of you) and if you consider yourself to be an entrepreneur, then you will definitely want to read this article.