What do you say to people claiming the Rubik's cube is easy?

I found commutators easy... some of mine were just 20 moves long. I still don't understand how to do commutators efficiently. The ones I first used to solve a cube were something like [L' R F2 L R' D L' R F' L R', U] and [[R' U L': D2], U].

Wow, I just couldn't figure them out myself. Stupid question, but what does those commutators do?
 
I just give them the cube with crazy pll perms and corner twists :p , minimum 3 corner twists
Impossible solve cube unless you know to counter the corner twists :)
 
Wow, I just couldn't figure them out myself. Stupid question, but what does those commutators do?
First one takes out UF edge and puts it back in place flipped, then does the same for another edge (if the second part of the commutator is U, it's UR, U2 is UB and U' is UL). Second one is A perm (swap two corners, swap another two corners) which can be modified to make an E perm.
My U perms were (R L' F2 R' L) u' (R L' F2 R' L) u2 (R L' F2 R' L) u' (R L' F2 R' L), and corner twists were R' D' R D.
 
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