So, then public domain is only “open source” in theory but not in practice? You’re right, I’m wrong. OSI doesn’t recommend against public domain for the reasons I claimed, and I’m making mistakes in this discussion. Thanks for clarifying.
It can be Open Source in practice too, as long as you make sure that your Public Domain dedication is actually effective around the world. The best way to do that could be something like CC0, but CC0 itself is problematic because of its explicit no-patent-grant clause, so it's not recommended to use on software. Instead, licenses like 0BSD or MIT-0 are probably your best bet, practically emulating Public Domain and being officially recognized Open Source licenses.
The problem is that there's no such thing as "public domain" that is consistent in jurisdictions around the world. If you want to make something "public domain," the best way is to slap an OSI-approved license on it.
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So, then public domain is only “open source” in theory but not in practice? You’re right, I’m wrong. OSI doesn’t recommend against public domain for the reasons I claimed, and I’m making mistakes in this discussion. Thanks for clarifying.
It can be Open Source in practice too, as long as you make sure that your Public Domain dedication is actually effective around the world. The best way to do that could be something like CC0, but CC0 itself is problematic because of its explicit no-patent-grant clause, so it's not recommended to use on software. Instead, licenses like 0BSD or MIT-0 are probably your best bet, practically emulating Public Domain and being officially recognized Open Source licenses.
The problem is that there's no such thing as "public domain" that is consistent in jurisdictions around the world. If you want to make something "public domain," the best way is to slap an OSI-approved license on it.