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Learning to speak, therefore, and the power it brings of intelligent converse with others, is a most impressive further step along the path of independence ... Learning to walk is especially significant, not only because it is supremely complex, but because it is done in the first year of life.

Learning to speak, therefore, and the power it brings of intelligent converse with others, is a most impressive further step along the path of independence ... Learning to walk is especially significant, not only