 Many will regard the bridge principles we have presented thus far to be problematic. They all relate “facts” about logical entailment—assuming there are such things—to certain normative constraints on the agent’s attitudes. The trouble, they will say, is that these principles are not sensitive to the cognitive limitations of ordinary agents. Agents, if they are even remotely like us, are not apprised of all entailment “facts”. Consequently, especially the “ought”-based principles (at least on some understanding of “ought”) are therefore vulnerable to Harman’s  Objection from Excessive Demands.