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(TMZ) - Kesha admitted Dr. Luke did NOT drug her, did NOT sexually assault her, did NOT have sexual relations with her ... and she swore all of it under oath, reports TMZ - which contradicts her lawsuit.

Kesha has accused Dr. Luke of a variety of misdeeds in her lawsuit, including rape, physical and emotional assault.  Dr. Luke filed his own suit saying her claims are false and it's all about Kesha wanting to get out of their management contract.

Now TMZ has obtained a deposition in 2011 in which Kesha and Luke were both being sued by her former manager. Kesha says flat out ... she and Luke never had sexual relations:

"QUESTION: Did you ever have an intimate relationship with [Luke]?

Question: Dr. Luke never gave you coke or drugs?
Answer:  Dr. Luke never gave me coke.

Question: Did Dr. Luke ever give you a roofie?
Answer: No"

According to TMZ, the deposition had been sealed ... and this morning Dr. Luke's lawyer went to court asking the judge in his case to unseal the depo and allow it to be used in the current case. TMZ reports Kesha's lawyer argued it was NOT fair game but the judge disagreed and unsealed it.

Kesha's lawyer, Mark Geragos, tells TMZ, using the depo is "a pathetic attempt to once again blame the victim." Geragos says Kesha lied because "Luke walked Kesha down the beach and threatened to destroy Kesha's life and the lives of her family if she didn't cover up his sexual assaults."  

Photo: Splash News