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62 J. ELLIS MCTAGGART : OBJECTIVE NOTION. that AC and AD were unrepresented species. If all car- nivora must be lions, tigers, or wolves, that would not prove that any of them were tigers or wolves. If the world had been so differently constituted that there were no tigers or wolves, that would have made no difference to the lions. (That is to say, it would have made no difference to them from the point of view of the Subjective Notion. The lions would not be affected by the disappearance of another sub- division of the class to which they belonged. In so far as they were objects in the same world, any change in the tigers would affect the lions, but that does not belong to the Sub- jective Notion.) It is quite different with the self-differentiating unity of End. There A is B, C, and D not B, C, or D for it is only in all the Means taken together that the End is mani- fested. Thus End and Means form a unity whose parts completely determine one another. The End determines the Means, since only one particular set of Means could express a given End. And, no less, the Means determine the End, since, when the Means are given, there is only one possible End which can be manifested by them. And, lastly, the various Means reciprocally determine one another. For none of the Means could be altered without altering the End, and this would alter all the other Means. With this the Objective Notion closes. The next step will take us into the last subdivision of the Logic the Idea.