Final answer:
A split brain patient would likely be unable to verbally describe an object seen only in their left visual field due to the severed corpus callosum preventing communication between the right hemisphere (which processes the visual information) and the speech center in the left hemisphere.
Step-by-step explanation:
A split brain patient would likely not be able to verbally describe an object if that object was only visible in their left visual field. This occurs because in split brain patients, where the corpus callosum has been cut to treat severe epilepsy, visual information from the left visual field is processed by the right hemisphere. Since the speech center is typically located in the left hemisphere and the two hemispheres can no longer communicate effectively due to the severed corpus callosum, the patient cannot verbally express what they see on the left side. However, they may still be able to select the object with their left hand even though they cannot name it, demonstrating the separate processing abilities of the two hemispheres.