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Engineering teams run tabletop exercises to rehearse disaster scenarios before they happen. The same practice applies cleanly to families and estate planning. Three scenarios, the gaps they'll surface, and how to facilitate the exercise so it actually surfaces them.

Microsoft's STRIDE framework was built for application security. It works just as well on personal OPSEC and estate planning — spoofing your identity, tampering with beneficiary designations, denial of service on your own life. A walk-through.

The check-in window on a deadman switch is a probability trade-off between false positives (firing while you're alive) and false negatives (not firing when you should). The honest math, and why the right cadence depends on more than just the slider in the settings.