 No experiment can completely rule out the logical possibility of conspiracies of this sort. One can, however, conduct experiments that guarantee independence of the settings and the state of the systems at the source on the basis of plausible physical assumptions. The experiment of Scheidl et al. (2010) was the first to employ random-number generators operating at spacelike separation from the generation of the particle pairs at the source. Following a suggestion of Clauser, other tests have employed measurements on photons from Milky Way stars (Handsteiner et al. 2017) and from distant quasars (Rauch et al. 2018). In addition, the “Big Bell Test” ran experiments utilizing inputs provided by approximately 100,000 volunteers (Abellán et al. 2018).