a condition resulting from a disease or accident in adulthood.” Novy v. Astrue, 497 F.3d 708, 709 (7th Cir.2007) (citation omitted). IQ tests or other contemporary evidence of mental retardation prior to age 22 is not required to establish onset before that age. Rather, the record “should contain some evidence” that permits an inference that the impairment existed before age 22 and is not of recent origin due to a traumatic event or some other changed circumstance. Markle, 324 F.3d at 188-189. Nothing in the record suggests that plaintiffs subaverage intellectual functioning was of recent origin. Evidence regarding his educational history before age 22 permits the inference that his mental retardation had an onset date during the developmental period. See Christner, 498 F.3d at 793 (<HOLDING>); Markle, 324 F.3d at 189 (holding that
holding that the alj erred in finding that the claimants mental retardation did not manifest itself before age 22 where the claimant attended special education classes dropped out of school in ninth grade had trouble with reading writing and math and had frequent fights with other children holding that where the claimant had worked for 22 years in a steel drum factory and as a security guard for about a year the claimants ability to maintain a job for most of his adult life called his mental retardation into doubt holding that circumstantial evidence existed supporting manifestation of the claimants mental retardation before age 22 including the claimants lowgrade dropout and participation in prior special education classes recognizing that texas courts have adopted the aamr definition of mental retardation providing that mental retardation must manifest before age of 18 years holding that the record did not belie the claimants iq of 58 where he attended special education classes did not live independently and dropped out of school at a low grade either in the sixth or eighth grade