This corrected ratio claims the corrected age must certanly be virtually zero since Pb 206 /Pb 207 = 21.5 for contemporary lead that is radiogenic. (117, p. 36)
Although Cook’s (28) logic may, superficially, appear reasonable and simple, it is suffering from a few severe flaws that are fundamental. First, 204 Pb is certainly not missing into the Katanga examples; it just wasn’t calculated!