Interesting question. I wonder what the default (implied) T&C would be if nothing has been explicitly stated. For example, publishing a source code without an explicit license doesn't make it open source.
Most T&Cs don't mean anything anyway. There are no default T&Cs, there's just the law.
Publishing code without a license doesn't give it an "implicit all-rights-reserved license" - it's just illegal to copy because that's what copyright law says. A license is a conditional waiver of copyright law, a contract where the author promises not to enforce copyright against you if you fulfil certain conditions. (and this is legally binding so they actually can't enforce copyright against you)
Publishing code without a license doesn't give it an "implicit all-rights-reserved license" - it's just illegal to copy because that's what copyright law says. A license is a conditional waiver of copyright law, a contract where the author promises not to enforce copyright against you if you fulfil certain conditions. (and this is legally binding so they actually can't enforce copyright against you)