[RightWingAtheist]

All humans have the same brain structure, but reading and writing are not found across all cultures the way spoken and gesutral languages are, nor is there any satisfactory explanation as to account for how reading, writing and drawing might have evolved through selective pressure. They are exaptated, as opposed to evolved traits, which arise through the co-option of one feature for a purpose other than the evolved one. A good example of an exaptated feature are the hammer, anvil and stirrup bones in the inner ear, which are found in all mammals. These were originally part of the jawbones of our reptilian ancestors, and wound being pushed in to the ear as the jaw evolved into a more efficent single-boned structure for chewing. You can feel this evolutionary legacy every time you sit down to a meal-the reason you can't follow a conversation while chewin and swallowing is because your jaw keeps jutting upwards into the ear canal.

[js1138]

I think it is undeniable that humans have an innate ability to tokenize experience and string the tokens together in syntax. This is supported by studies of people with brain damage who lose the ability to follow specific grammatical constructs.

There are people who inherit an inability to form regular verb tenses. The learn language, but have to learn every verb the way most of us learn irregular verbs.