The invitation to write a response to four, bewilderingly different, reactions to our paper (Gray et al., this issue) evoked in us an array of reactions that themselves ranged from puzzled silence to stunned incoherence. Not a very great range you might think, but we passed through some very diverse places between there and now. The dominating temptation was to just shrug, say “thanks” and leave it at that. But that temptation, in turn, eventually raised a constructive reaction that fell somewhere between a reflection on why one might write at all – and a reflection on silence. Amongst the greatest joys of our privileged existence as academics, it seems to us, are those moments of total absorption that follow the reading of a text or the hearing of an exposition. The intensity can be such that we burst with a need to respond: to speak, to laugh, to write. Response is demanded of us by the very intensity of our involvement with the narrative. Equally, we can remember those moments when we are stunned to a silence of appreciation and awe, as if in the presence of a great piece of music or architecture for the first time: we are made complete and are fulfilled in embracing a completeness in silence. And then there are those, happily rare, moments when one simply does not know what to say and a potentially embarrassing silence – not the silence of fulfillment and awe – opens like a chasm in front of one. We engage in a tendentious hyperbole if we try to suggest that this last is precisely where we find ourselves following the comments on our paper as each one engendered reactions of “what!?”, “pardon?”, errr!” and “oh yeah, that’s right”: it is the cumulative reaction that leaves us in this embarrassed silence.