RT @davidgissen: Purposefully illegible text from 12th & 21st centuries: A is unreadable by humans; B unreadable by digital scanners
via https://twitter.com/davidgissen/status/761595435005779969/photo/1
RT @davidgissen: Purposefully illegible text from 12th & 21st centuries: A is unreadable by humans; B unreadable by digital scanners
via https://twitter.com/davidgissen/status/761595435005779969/photo/1