Not a joke.

Copy left is like the Robin Hood of the copyright world. Basically, it’s a type of licensing where, sure, you can use, modify, and distribute the copyrighted work, but there’s a catch. You have to give the same rights to anyone else for any derivative works. So, if you modify the work, you can’t just slap a new copyright on it and restrict its use. It’s a way to ensure that the work stays free for everyone to use. It’s pretty popular in the open source community. It’s like copyright turned on its head, hence the name “copyleft”.

proprietariable just means the code can be taken and rerelased as proprietary (no freedoms all rights reserved).

This argument reminds me of the Tolerance Paradox described by Karl Popper, who stated that in order to maintain a tolerant society, the society must retain the right to be intolerant of intolerance.

In the licensing context, yes, the Apache and Expat licenses may grant your users the freedom to create proprietary software out of your works, but at the cost of sacrificing all the basic freedoms of all the users that will use the derived non-free product.

So, like Popper said that you should prefer removing the "smaller" freedom for a society of being intolerant in order to guarantee the "greater" one of remaining tolerant in the future, since you still have to choose which freedoms you are going to negate, it's preferable to use copyleft and impede the "smaller" freedom of creating proprietary software than not using it and allowing the crushing of future users' fundamental rights.

Well, it depends on your perspective. Copyleft licenses restrict downstream developers in order to protect the rights of downstream users.

It's really easy to detect duplicate programs. I've failed multiple students due to cheating on assignments. Code obfuscation is incredibly easy to detect using something like MOSS .

Fucking LOL