> Yes you can. See https://opensource.org/osd-annotated
Well. I have explained about that in the above comment. I'm not saying that you can't modify the source. But open source software don't require the user to be able to run the modified versions on the same device, free software do.
So the same software can be both free software and open source or open source only based on where the code is run.
Quoting from the above link:
Freedom 1 includes the freedom to use your changed version in place of the original. If the program is delivered in a product designed to run someone else's modified versions but refuse to run yours — a practice known as “tivoization” or “lockdown”, or (in its practitioners' perverse terminology) as “secure boot” — freedom 1 becomes an empty pretense rather than a practical reality. These binaries are not free software even if the source code they are compiled from is free.
Yes you can. See https://opensource.org/osd-annotated :
> 3. Derived Works
> The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software.