applies to words as well
Wikipedia page doesn’t have that anymore. But the talk page shows that it did use to be on the page. https://en.m.wikipedia.org/wiki/Rebecca_Hazelton
Maybe it’s possible to find that edit before it was removed somewhere in the edit history
Just checked, the page is being edited quite frequently. Many on the edits are about her lying.
A three year old would not have the ability to form that concept, let alone verbalize it.
Age two to five years old
Young children are interested in the idea of death, for example in birds, insects and animals. They can begin to use the word ‘dead’ and develop an awareness that this is different to being alive. However, children of this age do not understand abstract concepts like ‘forever’ and cannot grasp that death is permanent.
( Source )
Also, he is wrong.
The space outside the Noosphere is littered with the silently drifting corpses of words and whole language systems, dead and unchanging, forever cut off from being processed by any living mind.
Wait until she (or her son) learns about dead languages