CORVALLIS — Back in 2000, Oregon had a chance to clinch a Rose Bowl berth with a victory over Oregon State in the Civil War rivalry game. Instead, Joey Harrington threw five interceptions — three of them to Roseburg High graduate Jake Cookus — and the Ducks lost 23-13 in Corvallis. There’s been some debate among fans this week about which loss was harder, that game 12 years ago or Oregon’s 17-14 overtime loss to Stanford last weekend. Only time will ultimately tell for the Ducks, but the stakes are high again for this year’s Civil War on Saturday at …