 The constructive empiricist might reply that we are not warranted in saying that the humanoids have the experience of viruses unless we already treat the humanoids as being part of our epistemic community (van Fraassen 1985, 256–257). If we do expand our epistemic community to include them, then the constructive empiricist is happy to say that in that situation viruses are observable. But if we do not accept them as part of our epistemic community, then we will simply analyze them as like us, except having electron microscopes attached to themselves, and we will say that they are “reliable indicators of whatever the usual combination of human with electron microscope reliably indicates” (van Fraassen 1985, 257). In that case the extension of ‘observable’ is unchanged.