Context: Gray does not, however, give any indication of what available evidence these theories were at odds with, and his appeal to "crucial support" illustrates the very inductivist approach to science that Popper sought to show was logically illegitimate. For, according to Popper, Einstein's theory was at least equally as well corroborated as Newton's upon its initial conception; they both equally well accounted for all the hitherto available evidence. Moreover, since Einstein also explained the empirical refutations of Newton's theory, general relativity was immediately deemed suitable for tentative acceptance on the Popperian account. Indeed, Popper wrote, several decades before Gray's criticism, in reply to a critical essay by Imre Lakatos:

Question: Gray's approach aligns with which approach that Popper himself considered untenable?
Answer: inductivist

Question: A possible rebuttal to Gray's argument appears in Popper's reply to which philosopher?
Answer: Imre Lakatos

Question: What did general relativity do that made it tentatively acceptable when it was proposed?
Answer: explained the empirical refutations of Newton's theory

Question: In contrast to Gray, which theory did Popper argue was at least equally consistent with Newton's on the available evidence?
Answer: Einstein's theory

Question: What does Gray give an indication of?
Answer: Unanswerable

Question: What did Popper seek to show was logically legitimate? 
Answer: Unanswerable

Question: Whose theory was less well corroborated than Newton's on it's conception?
Answer: Unanswerable

Question: What was not deemed suitable for tentative acceptance? 
Answer: Unanswerable

Question: Who wrote several decades after Gray's criticism?
Answer: Unanswerable