 As a matter of stipulation, the act-set which would follow the act-set that terminates with ⟨voting for the language requirement⟩ at \(t_3\) is better than the act-set which would follow any other \(t_1\)–\(t_3\) act-set available to Jones at \(t_1\). So  (G)  implies that, at \(t_1\), Jones ought to do the best she can. However, (G) also implies that, at \(t_1\), Jones ought to ⟨stay home⟩ at \(t_1\) rather than ⟨go to the office⟩ at \(t_1\). This is because both acts are performable for Jones at \(t_1\), and the act sequence which would follow ⟨staying home⟩ is better than the act sequence which would follow ⟨going to the office⟩. So, according to (G), Jones has at least two obligations that are jointly unfulfillable, A: ⟨going to the office, then going to the faculty meeting, then voting for the language requirement⟩, and B: ⟨staying home⟩. Jones cannot perform both \(\langle A \lamp B\rangle\). There is no possible scenario in which both obligations are fulfilled.