It's probably been years since you played the gossip game in which one person whispers a message to his or her neighbor...then the message goes on to the next person and the next person - until it becomes unrecognizable.
Well, Siri and Google Voice are no better.
An artist named Michael Silber put them to the test as part of a thesis called "Digital Humor Theory" he authored at New York's Pratt Institute.
Silber wrote some text and had Siri read it. He phoned himself, left the recording as a voicemail message and had Google Voice transcribe it. Siri then read the transcription and Silber started the process all over again.
Fairly quickly the sentences lost all meaning. In what might be a promising bug in the system, the word "chocolate" started appearing - I like that!
Follow the link to hear the back-and-forth between Siri and Google Voice.