Other members of the Circle (including Schlick, Rudolf Carnap, and Herbert Feigl) also spoke with Wittgenstein, but not to Waismann's extent.
Herbert Hoover | Herbert Kitchener, 1st Earl Kitchener | Herbert von Karajan | Frank Herbert | Herbert Marcuse | Herbert Read | Herbert Blomstedt | Herbert Grönemeyer | Herbert Beerbohm Tree | Matthew Herbert | Herbert Spencer | Victor Herbert | Herbert | Herbert A. Simon | George Herbert | Charles Herbert Best | Herbert Howells | George Herbert, 5th Earl of Carnarvon | Brian Herbert | Aubrey Herbert | Sidney Herbert, 1st Baron Herbert of Lea | Herbert Chapman | Herbert Baumann | Herbert Austin | George Herbert Mead | Herbert Wise | Herbert Gintis | Herbert de Losinga | Henry Herbert, 4th Earl of Carnarvon | Herbert Wilcox |
C. D. Broad, Herbert Feigl, and Thomas Nagel, over a fifty-year span, presented insight to the subject, which led to Jackson's proposed thought experiment.