It has been mentioned from time to time that the KLM was given this message from ATC:
"Cleared for Takeoff Position"
I have never come across those words in any transcript before. Have you?
No.
There is no reference to such an instruction in the investigation report. In fact it's hard to believe that any ATC SOPs would contain a phrase with such a potential for dangerous misunderstanding.
Nor has any such claim been made by KLM, whose position
AFAIK was that the takeoff clearance was implied by the pre-departure clearance.