text: Some solar scientists claim that 20th century solar activity was merely ??? high ?? without warranting the ???grand maximum?? label, but that is a distinction without a difference. Whether ???high?? or ???grand,?? since we don??t yet understanding all of the ways that living inside the sun??s extended corona might affect global temperature (and there is the rub, that this understanding is still very immature), 80 years of any high level of solar activity could very well account for most or all of the modest warming over this period.