Spoken Word
Pretty much every known written and spoken language is meaningless without some sort of context to define it.
Take the modern schooling system (Or at least, my suck-ass english class). They get you to deconstruct Shakespeare (Honestly, if i ever get a time machine, i am going to SHOOT him, merely to spare generations of children the horror of this sort of work), to find its underlying meaning. These underlying contexts vary from person to person, which apparently, is why we are gotton to deconstruct the entire text in the first place.
Language is flawed because of the very fact that the message that the author is trying to portray is lost when a different person reads it, the underlying meaning changes.
Religious parables are especially vulnerable to this effect, and are thus the primary fuel for attack by atheists (No, this is not an invitation to start a religious discussion, i am stating a fact).
I would like to point out that there are a few languages that are immune to this rule: Binary, Most programming languages (Microsoft seems to have fudged that up TOO, with the .NET framework), whatever language our brain operates in (Thought language), and a few others (Most symbolic-oriented written languages, egyptian heiroglyphs for example), but pretty much every spoken language is vulnerable to that the reciever of the message can interpret it however they want, including in ways that the speaker did not intend.