The Big Four - Their Interdependence and Limitations

Four intuitions are recurrent and influential in theories about conditionals: the Ramsey’s test, the Adams’ Thesis, the Equation, and the robustness requirement. For simplicity’s sake, I call these intuitions ‘the big four’. My aim is to show that: (1) the big four are interdependent; (2) they express our inferential dispositions to employ a conditional in a modus ponens; (3) the disposition to employ conditionals in a modus ponens does not have the epistemic significance that is usually attributed to it, since the acceptability or truth conditions of a conditional are not necessarily associated with its employability in a modus ponens.