A methodological approach in philosophy that uses empirical tools—surveys, controlled experiments, and statistical analysis—to gather data about people's intuitions, judgments, or cognitive responses in order to inform, test, or refine philosophical theorizing; it investigates how ordinary or expert judgments vary with psychological, cultural, or contextual factors.

Principle

Empirical elicitation of intuitions can reveal the distribution, variability, and determinants of folk or expert judgments, thereby testing claims that philosophical theories rely on stable, universal intuitions and supplying descriptive constraints that philosophical explanations should accommodate.

Demonstration

Illustrative scenario → Recognition → Action → Consequence: Researchers design a survey that presents varied descriptions of a moral dilemma to demographically diverse respondents (Recognition). They analyse how responses change with scenario wording and respondent background (Action). The results show systematic variation, prompting philosophers to revise theories that had assumed a single uniform intuition (Consequence).

Misapplication

Treating descriptive survey outcomes as settling normative philosophical questions, or generalizing from non‑representative samples and poorly framed questions. The semantic error is conflating what people believe (descriptive data) with what is epistemically or morally justified (normative conclusion) without additional argument.

Consequence

Provides empirical constraints on claims about the universality or variability of intuitions, highlights sources of bias, and can motivate refinement of conceptual analyses or experimental control in philosophical argument. It may shift emphasis from purely armchair methods to mixed empirical–analytic practices.

Reversal

Findings do not by themselves resolve conceptual or normative disputes: empirical variation may reflect cultural or methodological artifacts rather than undermining theoretical claims. Moreover, when philosophical debate concerns normative justification rather than descriptive psychology, experimental results play a limited evidential role.

Boundary

Clearly within: controlled studies that measure how specific framings affect respondents' intuitive judgments about a philosophical case. Boundary case: using correlational psychological findings to draw broad normative conclusions—necessitates careful bridging arguments. Clearly outside: treating popular opinion polls as decisive evidence for complex metaphysical claims without philosophical argumentation.

Semantic Tension

Tension between empirical data and a priori conceptual analysis: empirical methods can challenge assumed universals of intuition, yet some philosophical tasks (e.g., conceptual clarification, normative justification) resist resolution by descriptive facts alone.

Synthesis

X‑Phi supplements rather than supplants traditional philosophical methods: it supplies data about how judgments are distributed and influenced, thereby informing theory choice and methodological reflection, while remaining distinct from normative or purely conceptual justification.