Case context: A three-component speech system computes MFCC features, recognizes a phoneme sequence, and then produces a transcript. Inspection shows that the phoneme sequence is correctly recognized, but the resulting transcript is incorrect.

Question: Based only on the component roles in this pipeline, which component should be diagnosed most directly, and why?

Sample answer: The final recognizer should be diagnosed most directly. The phoneme sequence has already been recognized correctly, so the remaining component responsible for stringing that sequence together into an output transcript is the final recognizer.

Key points:

• The recognized phoneme sequence is already correct.
• The final recognizer receives the phoneme sequence.
• The final recognizer is responsible for producing the transcript.
• The observed error occurs in the transition from phonemes to transcript.

Rubric: The response should identify the final recognizer, connect it explicitly to transcript production, and use the correct phoneme sequence as the reason for focusing diagnosis after the phoneme-recognition stage.