EPSILON: Testing a Claim’s Neighborhood

Field notes

EPSILON treats robustness testing as a sequence of controlled perturbations: define a claim and rejection rule, change one documented assumption per run, then retain assumptions, outcomes, provenance, and limitations together. The homepage’s evidence plate shows a baseline of +6.20% alongside fee, slippage, window, universe, and joint-stress variants; the displayed sample remains directionally positive, though joint stress falls to +0.84%. The site also invites external challenges and says substantive responses receive a public disposition and inspectable follow-up.