I examine two explanations for the cosmic microwave background (CMB) that recent creationists have proposed, 1) radiation from dust, and 2) Eddington's "temperature of space" computation. Both of these suggested sources have problems. Radiation from dust is too clumpy and has too high temperature to be the source of the CMB. Eddington's model of the "temperature of space" differs from the characteristics of the CMB in at least three ways. I also examine some claims from critics of the big bang that the CMB plots have been manipulated to mimic a blackbody spectrum and find that argument to be baseless. I briefly survey four problems with the CMB being the remnant of the big bang. These considerations present the possibility that no one yet knows the true origin of the CMB.