Without further comment, the author has dropped this link as a response to my comment: https://www.w3.org/TR/UNDERSTANDING-WCAG20/meaning.html
Yes, that is the old WCAG 2.0 Understanding for WCAG Guideline 3.1. Which has nothing to do with WCAG 3. And nothing with color contrasts. *sigh*
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.