Sure, but a read receipt (if you even get one) is ambiguous. I can assume that you&#x27;re thinking about how to respond, but responding immediately with &quot;hmm&quot; is an explicit acknowledgement indicating that you need to need a moment to consider. If it seems weird, I&#x27;d chalk it up to the general awkwardness of trying to translate useful, non-verbal aspects of communication into textual analogs.