You can obfuscate source code also--see what people do with JavaScript on websites--so the answer is "no" under any case. (In specific, though, contracts are im

You can obfuscate source code also--see what people do with JavaScript on websites--so the answer is "no" under any case. (In specific, though, contracts are implemented in a bytecode, so by more basic definitions of "open source" the answer is still "no".)