That'd not what they said: they made a claim that a single alphabet is insufficient, and thus Greek makes as good a choice as it was used historically too (and

That'd not what they said: they made a claim that a single alphabet is insufficient, and thus Greek makes as good a choice as it was used historically too (and allows easy differentiation). Math also uses made up symbols specific to math a lot (integral, summations, arrows, operators...). If you want to claim that Greek is the problem, how would you solve the problem of insufficient symbols?