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for teacher-forcing

• Exposure bias: the model trains on the teacher's prefixes and runs on its own
  > **Verification note (2026-10-08, session wiki-verify-2026-10-08):** Verified 2026-10-08: re-read Seq2seq — the teacher-forcing definition with the verbatim ŷ₁≠y₁ clause, the "trained purely by teacher forcing → degrades at prediction time" sentence, the "exposure bias / train/t…
  field/exposure-bias · exposure-bias, teacher-forcing, training, llm, seq2seq, distribution-shift