  designates only the specific expression therein depicted, containing a specific Greek letter. In order to effect reference to the unspecified expression he introduces a new notation of corners (namely, ‘┌’ and ‘┐’). So, for example, if we take the expression ‘Quine’ as μ, then ┌(μ)┐ is ‘(Quine)’. The quasi-quotation is synonymous with the following verbal description: The result of writing ‘(’ and then μ and ‘)’ (Quine 1940, p. 36). For an interesting suggestion about quasi-quotation in natural language, see Saka (2017).