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Re:Toddlers are harsh judges of moral character by samhw on Tuesday December 21, 2021 @05:09AM (#29635829)
I don't think the claim relies on siblings' environments being the exact same. The point is just that the degree of intra-family similarity is almost always far greater than the degree of average inter-family similarity. To a reasonable approximation it's fair to call it 'the same' in the context of the comparison with non-siblings.
Re:Toddlers are harsh judges of moral character by tsimionescu on Tuesday December 21, 2021 @05:26AM (#29635922)
I don't think that's true - the difference between being an only child and having older siblings is much more than the difference between two only children in relatively similar (from a socio-economic point of view) families, I would say.

The way parents interact with their first child and subsequent children is significantly different, and the added interaction between the children themselves compounds these.

Re:Toddlers are harsh judges of moral character by martinlaz on Tuesday December 21, 2021 @05:25AM (#29635916)
OK, but the claim is that siblings are different, despite growing up in the same environment, because they have their "own nature and character by birth".

I guess what I'm saying is that they might become different due to the environment necessarily changing in pretty significant ways for each of them.

Re:Toddlers are harsh judges of moral character by samhw on Tuesday December 21, 2021 @07:49AM (#29636854)
Ah, perhaps I misread the argument actually. I agree, that's definitely an important counterpoint. Sorry about that!

Sadly I can no longer edit my original comment, since it's >=2hrs old, but hopefully this can stand as a self-correction.