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A tract must be distinguished from the abstract sequence of sentences, <math>S_1, \ldots, S_k,\!</math> where the commas that appear to come to mind, as if being called up to separate the successive sentences of the sequence, remain as partially abstract conceptions, or as signs that retain a disengaged status on the borderline between the text and the mind.  In effect, the types of commas that appear to follow in the abstract sequence continue to exist as conceptual abstractions and fail to be cognized in a wholly explicit fashion, whether as concrete tokens in the object language, or as marks in the strings of signs that are able to engage one's parsing attention.

A tract must be distinguished from the abstract sequence of sentences,

S_1, ..., S_k, where the commas that appear to come to mind, as if being

called up to separate the successive sentences of the sequence, remain as

partially abstract conceptions, or as signs that retain a disengaged status

on the borderline between the text and the mind.  In effect, the types of

commas that appear to follow in the abstract sequence continue to exist

as conceptual abstractions and fail to be cognized in a wholly explicit

fashion, whether as concrete tokens in the object language, or as marks

in the strings of signs that are able to engage one's parsing attention.

Returning to the case of the painted cactus language !L! = !C!(!P!),

Returning to the case of the painted cactus language <math>\mathfrak{L} = \mathfrak{C} (\mathfrak{P}),</math> it is possible to put the currently assembled pieces of a grammar together in the light of the presently adopted canons of style, to arrive a more refined analysis of the fact that the concept of a sentence covers any concatenation of sentences and any surcatenation of sentences, and so to obtain the following form of a grammar:

it is possible to put the currently assembled pieces of a grammar

together in the light of the presently adopted canons of style,

to arrive a more refined analysis of the fact that the concept

of a sentence covers any concatenation of sentences and any

surcatenation of sentences, and so to obtain the following

form of a grammar:

===Grammar 2===

===Grammar 2===