I feel like this is an example of a failure of coordination where one confuses teleological design choices made by someone with specific intents with mere techn

I feel like this is an example of a failure of coordination where one confuses teleological design choices made by someone with specific intents with mere technical facts/incidental conditions of the context you find yourself in. The author is surprised that the dummy string is valid base64. Other comments on this thread discuss whether all lowercase strings are valid and whether implementations differ. But ... Isn't the point of using base64 (rather than hex or something) to make a large share of easily typeable strings valid (which implies they can be shorter/faster/cheaper)? I.e. someone upstream of you _wanted_ "changeme" to be valid, and the misunderstanding is less about the technical details of base64, and more about a hidden conflict in desires between people making design choices separated by time, space, and perhaps organization.