Why is this so hard to get? Hef is right, as usual.
ITPOE is one song. It was split into two parts on the album, but it was written and recorded as one song, and the vast majority of the time played as such (remember, even ACOS has been played split into parts, so that isn't an argument.)
To dispel all arguments, here is what I believe is accepted by most DT fans:
"Six Degrees Of Inner Turbulence" is
one song, but
eight tracks (also known as movements). Some of these have been played in pairs or trios.
"A Change Of Seasons" is also
one song, but has seven movements, some (four?) of which have been played individually or in pairs.
"In The Presence Of Enemies" is
one song, but was split to become
two tracks. Much like Pink Floyd's "Shine On You Crazy Diamond" or The Flower Kings' "I Am The Sun", this 25-minute epic is split to bookend the album, mostly for reasons already stated (as it was a great opener AND closer, but also because the band/MP felt it would been too soon to have a single 25-minute track on an album again right after "Octavarium"). Like both ACOS and SDOIT, the song has been played live as a whole and released on an official live album as such, and all as one track.
EDIT - I'd also like to note that OTHER multi-movement songs/epics have been cut up before. On the SC Tour, they used the first movement of "Trial Of Tears", "I. It's Raining" (albeit truncated), to open their encore, "Schmedley Wilcox". To close the medley, they used the last movement of "Octavarium", "V. Razor's Edge". So ACOS, SDOIT and ITPOE aren't the only multi-movement epics that have had parts played apart from the whole song. In fact, even songs that don't have separate movements have been used in various medleys throughout DT's career, such as the "When Images And Words Unite" medley from the Scenes Tour (featured on the
Through Her Eyes single).
While we're at it, "A Mind Beside Itself" is a suite, not a song, but it does have designated movements within the suite.
"Wait For Sleep" and "Learning To Live" are NOT one song, nor do they belong together like AMBI. They simply share a recurring melody (and the same goes for "Far From Heaven" and "Breaking All Illusions", as well as "Vacant" and "Stream Of Consciousness"). If this were the only basis to making two songs belong together as a suite, then practically ALL of
Scenes From A Memory would be a single song considering many of the tracks share melodies, chord progressions, lyrics, etc. etc.
And the "Meta-Album" only goes from SFAM to 8VM and stops there - the ending sound of "The Count Of Tuscany" is NOT the opening sound of "On The Backs Of Angels".
*whew*...did I miss anything?
-Marc.