There’s a slew of neutrons out in the Crab Nebula, and a slew of photons coming our way, but there’s no objective criterion for “pulsar,” >
Last para is sneering specifically at Frege’s logicism (“sense and reference” is his phrase) and subsequent logical positivismpic.twitter.com/wxuFNVoTO0
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Ethno correction is NOT that we can’t/don’t refer to objects, but that reference “is an accomplishment”: a product of practical activity
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