Grice on Aristotle on the multiplicity of being -- Meth. 1017a27-30

Grice's Aristotle

Grice rejects this existential interpretation of a copulative 'is.'

Grice does so mostly on the remark of 1017a27-30 on the equivalence of

'Socrates walks' and 

'Socrates is walking'. 

Grice attacks Owen for making this or that mistake concerning existential presupposition,
his distinction of two types of existence (izzing and hazzing), and Aristotle's consequent inability to assert 

'Goat-stags do not exist' 

and 

Goats exist'.