What is the test for obtaining habeas corpus from a federal court?

As a condition for obtaining habeas corpus from a federal court, a state prisoner must show that the state court's ruling on the claim being presented in federal court was so lacking in justification that there was an error well understood and comprehended in existing law beyond any possibility for fairminded disagreement.

Harrington v. Richter, U.S., 131 S.Ct. 770, 775, 776-77 (2011).

The undersigned also finds that the same deference is paid to the factual determinations of state courts. Under 2254(d)(2), factual findings of the state courts are presumed to be correct subject only to a review of the record which demonstrates that the factual finding(s) "resulted in a decision that was based on an unreasonable determination of the facts in light of the evidence presented in the state court proceeding." It makes no sense to interpret "unreasonable" in 2254(d)(2) in a manner different from as that same word appears in 2254(d)(1)-i.e., the factual error must be so apparent that "fairminded jurists" examining the same record could not abide by the state court factual determination. A petitioner must show clearly and convincingly that the factual determination is unreasonable. See Rice v. Collins, 546 U.S. 333, 338, 126 S.Ct. 969, 974 (2006).