You are mixing weak and dynamic typing together. Weak, as in JavaScript, PHP, does allow "1"+1 stuff and should be burned with fire. Dynamic strong typing, as i

You are mixing weak and dynamic typing together. Weak, as in JavaScript, PHP, does allow "1"+1 stuff and should be burned with fire. Dynamic strong typing, as in Python, Ruby, does not allow such stuff (though can not be catched at compile time)