Impossible in a single step, but perhaps impossible is too strong a word to reject the possibilities that arise when we consider how the statistics of words, or sounds are connected. If you can work out the statistical correlation between groups of sounds you can start to gain an idea of how they are interrelated. This is a stepping stone on the path to understanding.
>the statistical correlation between groups of sounds
That assumes that the speaker is similar to the person correlating the sounds. For example, if you had statistical data for utterances of English sounds in the context of Magic the Gathering tournaments, and you tried to decipher the speech of a Swahili electrical engineer talking about transistors, you could very well decipher something that's seemingly coherent but entirely incorrect.
It would be an overgeneralization to assume that whales speak about things in the same statistical patterns that humans do.
