そうだったのオレはてっきり

Translation: I was right, there's no mistaking it
CC BY-SA 3.0
2017-06-22T15:40:53.353
48657
2017-06-22T19:08:47.280
21885
question
grammar translation
Is this correct?
そうだったの means "Is that so!", "Now I understand". This phrase ～だと思った probably
would follow after オレはてっきり. So it means "I certainly thought that ～".
CC BY-SA 3.0
2017-06-22T16:37:03.037
48660
2017-06-22T19:08:47.280
2017-06-22T19:08:47.280
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7320
48657
answer