At 70% should you take it

Archived study

Builds an umbrella decision model around a stated rain probability, exposure time, and the relative inconvenience of carrying an umbrella versus getting wet. The session compares rain-timing assumptions and saves a break-even table and figure.

Interpretation and limits

The continuous rain-block duration is an explicitly unverified scenario parameter. This illustrates sensitivity to exposure and costs, rather than deriving a personal forecast from the headline rain probability.

Package and provenance

The original .science export and matching poster are preserved byte-for-byte from the upstream case. The package contains the conversation, session metadata, and the resources inventoried in its internal manifest. This introduction summarizes the archived record; the research, external sources, and model evaluations were not rerun for this import.