Now that is consistent with this individual because this individual must be x lowercase by to actually display that disease phenotype. But this individual does not display that phenotype, it is male. So that means it must be x uppercase by. And this genotype cannot exist if we cross these two individuals as shown in the following pundit square. And so what that means is this pedigree cannot describe a disease that is sex link recessive. So it can't be sex link recessive as a result of this inconsistency between the pedigree analysis and the pun and square analysis.