Made of the same wordstuff

The first problem is that at around age one, a healthy human discovers the world is made of words and delights in this. That's a dog. That's a Lego. The Lego is under the table. At approximately age one, the human child feels the power of words awaken within them. They delight to discover that the world responds to their words. When they call to the world in words, the world hears and answers. The dog comes. The Lego is a Lego. The child rejoices to know that the world is made of the same wordstuff as their new mind.