Which key is incorrectly stated as being used to capitalize letters on the left half of the keyboard?

The RIGHT SHIFT key is the incorrect choice when discussing the capitalization of letters on the left half of the keyboard. The function of the SHIFT key is to enable capitalization of letters and to access alternate characters on the keyboard.

In this case, the LEFT SHIFT key is specifically designed for use with the left-hand side letters, allowing users to type capital letters easily. The CAPS LOCK key can also be used to type in all capital letters, but it applies to the entire keyboard, including both the left and right halves.

The ALT key, on the other hand, is used primarily for accessing alternate functions or commands in combination with other keys and is not associated with typing capital letters. Thus, the RIGHT SHIFT key does not provide the necessary function for capitalizing letters found on the left half of the keyboard, making it the answer to this question.