No, its not at all disingenuous. Facebook could have written the "Additional Grant of Patent Rights" (note: additional) to also terminate the copyright grant un

No, its not at all disingenuous. Facebook could have written the "Additional Grant of Patent Rights" (note: additional) to also terminate the copyright grant under the BSD license. But they did not: https://github.com/facebook/react/blob/master/PATENTS https://github.com/facebook/react/blob/master/PATENTS