I'm convinced that voice pitch, syllable meter, hand gestures, facial gestures, and other forms of non-word emphasis are also crucial to figuring out basic phra

I'm convinced that voice pitch, syllable meter, hand gestures, facial gestures, and other forms of non-word emphasis are also crucial to figuring out basic phrase chunking and word types, with minimal interaction, early on. Seems it would be far harder to infer the basic initial structure from just plain text.