Optimal action under ideal assumptions can be useless under real conditions

Evidence

Economists since the mid-twentieth century have discussed the “theory of the second best,” which argues, in effect, that knowing the right thing to do in a theoretical version of the economy, which obeys a number of mathematical assumptions, may have virtually no bearing in an economy that deviates from those assumptions even slightly. The “second-best” policy to follow, or action to take, may have virtually no resemblance to the best. — Brian Christian, The Alignment Problem, 1033

Categorization

  • corroborated: 2 independent passages support this claim — Brian Christian, The Alignment Problem, 1033
  • XREF: connects to: Design choices optimizing for one task can cripple performance on the real task — Brian Christian, The Alignment Problem, 1221; An agent should plan around its own future errors, not ideal execution — Brian Christian, The Alignment Problem, 1031; Choice of action should hinge on what will actually happen, not ideal possibilities — Brian Christian, The Alignment Problem, 1018 (+16 more)

Broader Connections