We are unfinalised so there has to be a deferral of meaning on what we are

Some half baked teacher, in a kind of Liberal cri de couer,  each week drones on about us all being the same, however if we care to look at the word polyphony (many voices) and care to examine the unfinalisability in our selves this notion of us all being the same is put to the rack. ,

Even the statement we are ‘all the same’ is loaded with

 Différance (a French term coined by Jacques Derrida) 

It is a central concept in Derrida's deconstruction, a critical outlook concerned with the relationship between text and meaning. The term différance means deferral of meaning.

In the meaning game 
Heteroglossia is a useful word as it is the base condition governing the operation of meaning in any utterance