Nathanael Comfort – Journal of the History of Biology 32: 133–162, 1999.
Of McClintock’s much-vaunted interest in the paranormal, her friend Evelyn Witkin said it wasn’t belief, but that “she just felt we were at a point of profound ignorance, that we were overestimating our understanding of the way things worked.” The reference was to nature, but it might have been to the nature of science.