|Explicit delimiters are present also in math, and are a necessary element of it. Want to say that is useless to use them since you can get how the equation goes out of the context? I think not.
From time to time, I see this idea of programming using natural language coming out. Something like: "hey, how good will be if we can program as we speak?". Useless to say I consider this a constrain to programming, which I see as a way more wide world.
Not to mention that people can associate different meanings to the same sentence, and this usually leads to (sometimes fatal) accidents. I don't wish to see this happening in programming. It shall be, in my opinion, something that should not be possible to read in another distorted way (depending on the mood or the context).
Just like math, parenthesis et all are there for a reason; skip them, and you wont pass the exam.