Notes:

There are some flaws in this flowchart, one being the "no modifiers" part. One Laptop Per Child SimCity includes some additional requirements on top of the regular GNU GPL version 3 licensing related to trademarks, and still is open-source software.
There are also other exceptions in notable OSS software, like the syscall interface exception for the Linux kernel, the GCC Runtime Library Exception, the Java classpath exception, and the CUPS exceptions for Linux compatiblity purposes.