Are natural numbers mental abstractions?

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SUMMARY

The discussion centers on the nature of natural numbers as mental abstractions rather than concrete entities. It argues that numbers are fundamentally tied to the categorization of objects, such as fruits or rocks, which are themselves constructs of classification. The conversation emphasizes that while numbers serve as effective tools for prediction and understanding, they derive their meaning from the categories we create. The distinction between counting items within the same category versus different categories is highlighted, illustrating the subjective nature of numerical representation.

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FallenApple
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Say you have an orange and a banana. You can say that they are two fruits. But this pertains to the categorization of fruit, which could be considered a mental construct of a category. You cannot say that you have two yellow objects, because you really don't. Relative to the category of color, the fruits do not form a set.

Say that during a time when no humans were around, there were 10 rocks lying around at some location. It seems that this must be true. But this presupposes the concept of rock, which is a classification. The "rocks" have many other characteristics that do not overlap. You can have 5 spherical rocks and 5 block like rocks. Or 3 blue items and 7 red items, or an infinite number of other possible combinations depending on the category since there are maybe conceivably infinite many categories.

So it seems that numbers are just abstractions of things that fall into the same category. Yet they are extremely good at predicting the world, interestingly. Perhaps due to our high ability to categorize things correctly, which we defined in the first place.
 
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FallenApple said:
Say you have an orange and a banana. You can say that they are two fruits. But this pertains to the categorization of fruit, which could be considered a mental construct of a category.
How is that different from having a banana and another banana, with the mental category "banana"?

This is a mathematics subforum, not a philosophy forum. Do you have a question about mathematics?
 

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