Here is what i have learned from debating the nice folks at JREF.
They have been most helpful in providing websites containing data that proves, beyond a reasonable doubt, WTC 7 did NOT collapse due to DD/F.
The evidence for the '10 story gouge':NIST L-18 [22 on pg counter]
http://wtc.nist.gov/progress_report_june04/appendixl.pdf"middle 1/4 to 1/3 width of the south face was gouged out from floor 10 to the ground"
Evidence that the '10 story gouge' was a misinterpretation of the actual damageL-18
"No heavy debris was observed in the lobby area as the building was exited, primarily white dust coating and black wires hanging from ceiling areas were observed."
[a gouge floor 10 to the ground would have left a pile of heavy debris in the lobby 60 to 80 feet wide from the south facade to the elevators]
“debris damage across ¼ width of the south face, starting several stories above the atrium [ground to floor 5], noted that the atrium glass was still intact"
[cannot co-exist with – gouge, floor 10 to the ground]
The atrium, ground to 5th floor, is the area between the promenade on the left and the pedestrian bridge on the right.

FEMA 5-20
http://www.fema.gov/pdf/library/fema403_ch5.pdf“According to the account of a firefighter who walked the 9th floor along the south side following the collapse of WCT 1, the only damage to the 9th floor facade occurred at the south west corner."
Oral Histories: Chief Frank Fellini
[in charge of operations at West and Vesey]
http://graphics8.nytimes.com/packages/html...es_full_01.html “When it fell [WTC 1] it ripped steel out from between the third and the sixth floors.....”
[Do you think he did not notice a gouge, 120 feet high, 60 to 80 feet wide, and 30 to 40 feet deep, in the middle of WTC 7 ?]
NIST ignored the two statements on the same page that were in conflict with the "middle 1/4 to 1/3 width of the south face was gouged out from floor 10 to the ground" and the statement in the FEMA report.
They then showed this 'damage' in the graphic on pg 23 as "Possible region of impact damage" and again on pages 31 & 32 as "Approximate region of impact damage"
In the Summary item 3) they describe the damage attributed to this gouge [columns 69, 72 and 75] as Possible components that may have led to the failure of columns 79, 80 and/or 81.