 The main challenge for the indexical approach is that of specifying the character of Gen. Sterken suggests that the character of Gen is such that the content of a generic utterance depends on what generalization the speaker intends the utterance to express and whether her intention could be recognized by a sufficiently idealized person that is privy to the conversation. If the character of Gen is as described, this seems to explain why generics can be so flexible. However, it also seems to make generics too flexible: some generics (e.g., “tigers don’t have stripes”, “ravens are white”) seem straightforwardly false and some generics seem straightforwardly true (e.g., “triangles have three sides”, “primates aren’t avians”), regardless of the speaker’s intentions (and of anyone’s ability to detect those intentions). Whether such an account can handle such cases remains to be seen. Moreover, the indexical account is supplemented by Sterken with an error theory for generics such as “mosquitoes carry West Nile virus” (2015b), further increasing its flexibility. For critical discussion of the motivation for the error theory, see Almotahari (forthcoming). More generally, the indexical account—unless it is supplemented with a rich metasemantic account of the character of Gen—is not clearly constrained enough to issue in substantive predictions concerning the truth/falsity of generics.