No need to apologise, sorry for the unwarranted grumpy replies. Clearly it's tough to design for a wide audience, some of whom want to reason about programs as

No need to apologise, sorry for the unwarranted grumpy replies. Clearly it's tough to design for a wide audience, some of whom want to reason about programs as a series of steps, and some of whom deal with compositions of abstractions which may have deeper meanings outside the computer.