Challenges to Matthew's claim to priority, or those made since he died, have essentially made reference to the same issues, that his description of natural selection was not accessible and it lacked lengthier development. Other criticisms have focussed on the differences between Darwin's and Matthew's versions of natural selection, and sometimes Wallace's too ("e.g.", Weale 2015). If Matthew's ideas had made the impact on subsequent evolutionary thinking, as claimed, the signals ought to be there, either during Matthew's lifetime, or Darwin's. Yet, modern claims for Matthew's priority have been unable to provide evidence for this, that has withstood fact checking.