A reminder that "For sale: baby shoes, never worn" isn't the shortest horror story ever written, it's actually "Specifies a tri-state Boolean value" written by the esteemed author Microsoft .NET Documentation.
Context: https://learn.microsoft.com/en-us/dotnet/api/microsoft.office.core.msotristate
Note that there are actually 5 values, not three. Also True is -1, and the value that equals 1 isn't supported.

learn.microsoft.com
MsoTriState Enum (Microsoft.Office.Core)Specifies a tri-state Boolean value.
My gateway into AI was using Claude to try to figure out MS's XML configuration files for their now deprecated Azure B2C identity provider. Their documentation is really bad.
https://claude.ai/share/97c73874-6981-4ebc-b473-19f5bdddd1bd
claude.ai
MsoTriState enum in Microsoft.Office.CoreShared via Claude, an AI assistant from Anthropic