Re: Quite.
" when the child comes to a conclusion you can ask them to explain why they think that is so."
It depends on the age of the child. Before they acquire language infants are learning how to interpret the various sensory inputs. One of the things they can do is reach out to touch what they see so they can correlate the tactile qualities of what's in the visual field. They can't explain how they learn that. In fact, can you, as an adult, explain how you recognise an everyday object such as a cup?