Induced Sample Space = {-2, -1, 0, 1, 2, 4} is the Induced Sample Space.

Today was going so well.  I went to both lectures, went for a walk with Liz, had dinner, and got to my workshop on time.  Then it all went down hill.

My tutor gave back my assessed questions and commented on some of my answers as is the usual practice.  Once again he said I hadn't written enough explanation.  Usually I can sort of see where he's coming from but this time it was ridiculous. The question had given some information and then asked

"Find the induced sample space for R"

My course notes say

"The range of values taken by the random variable R defined on Ω, that is {R(ω) : ω ϵ Ω}, is known as the induced sample space for R and is written as S"

Which basically says S is the symbol for the induced sample space so my answer to the question was

S={-2, -1, 0, 1, 2, 4}

I should point out that Matt's answer was the same.  Also that Matt got the marks.  I, however, did not get the marks.  My tutor had a right go at me and said I needed to explain that S was the induced sample space, despite what is written in the notes.  He said I should have written

S={-2, -1, 0, 1, 2, 4} is the Induced Sample Space.

Which to me would read "The Induced Sample Space = {-2, -1, 0, 1, 2, 4} is the Induced Sample Space."
That's just silly.

It reminded me of the X Y is X meme.  From Encyclopedia Dramatica, 

X Y is X (XY=X) is the horrendously overused and clichéd algebraic format that *channers use to express their feelings towards something. Whether it be <3, h8, elation, sadness, or even a strong sexual urge, this textual meme is a convenient way for you to say what's on your mind without actually having to use it...The general idea is that by repeating yourself and being unnecessarily redundant, your arguments and ideas will make more sense and will cease to be completely idiotic.

(Be warned that all links go to Encyclopedia Dramatica pages that are probably full of swearing and inappropriate pictures and advertisements)
Here are some of the examples given on Encyclopedia Dramatica:

• Obvious troll is obvious.
• Long cat is long.
• Redundant phrase is redundant.

I need to go see some live comedy to reduce my anger at losing marks despite getting everything right.  Oh look, Jon Richardson is doing a gig at the university tonight and I've got tickets.  That's fortunate.