Intuitive Logics Scenario Planning

The two-by-two structure is a deliberate trade-off between richness and tractability. Two critical uncertainties yield four combinations, which is enough to capture genuinely different futures while remaining few enough for a team to develop and remember. Using more axes would multiply scenarios beyond what people can meaningfully work with, while using one would not capture the interaction between uncertainties. Selecting the two most pivotal and independent uncertainties concentrates the analysis on the doubts that matter most, which is why intuitive logics is built around the four-quadrant matrix.

Intuitive logics is a deductive, qualitative method: it builds a small set of internally consistent narratives from chosen uncertainties and deliberately does not assign probabilities, since its purpose is to stretch thinking and test robustness rather than to forecast. Probabilistic methods such as cross-impact analysis or SMIC Prob-Expert instead elicit likelihoods and compute the probabilities of scenario combinations. The intuitive-logics view is that putting numbers on deeply uncertain futures can create false confidence, whereas critics value the discipline probabilities bring; in practice the approaches are sometimes combined.

A good axis uncertainty is high-impact, genuinely uncertain, and reasonably independent of the other axis. High impact ensures the scenarios it generates matter to the decision; genuine uncertainty ensures the futures actually differ rather than collapsing onto a predetermined trend; and independence ensures the four quadrants are distinct and plausible rather than redundant. It also helps if the uncertainty can be expressed as two clear, contrasting poles. Forces that are important but predictable belong instead among the predetermined elements common to every scenario.