We're concerned with who but never why,
We cause the tears but not the cry.
We're from a world that's found by you,
Where two is one and one is two.
What are we?
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Vowels
We're concerned with who but never why,
who has a vowel but why doesn't (in this instance, we don't count 'y')
We cause the tears but not the cry.
tears has two vowels but cry does not have any.
We're from a world that's found by you,
Vowels are representations of vocal sounds constructed by humans.
Where two is one and one is two.
two has one vowel, one has two.