In Roger Pielke Jr.’s The Honest Broker (2007) he discusses different roles a scientist can adopt when giving advice to policymakers. The honest broker role focuses on clarifying and expanding the scope of choice for others. This role has the virtues of being sensitive to known problems with experts being partisan by stealth, dominating policy decisions by controlling knowledge input, and reducing the scope of considerations deemed relevant to decision-making. Yet I argue that to the extent the honest broker role (...) involves expanding the scope of choice, an array of problems arises. These include ambiguity about which and whose consensus ought to guide scientists in their decisions about what role to adopt, an implicit tendency to insulate politics from science, and a possible replication of the anti-pluralism of political populism. Drawing upon Phillip Pettit’s critique of Isaiah Berlin’s account of freedom as non-interference, I argue that the honest broker role for scientists inherits the problems afflicting accounts of freedom as the non-restriction of options: namely, the problems of adaptive preference formation and ingratiation. On this basis I suggest not advising scientists to be honest brokers, because doing so might fail to help them be reflexive scientists. (shrink)