An engineer is building a system to generate a single quality score for a model's text response based on an initial prompt. Their proposed process is as follows:

1. Concatenate the prompt tokens and the response tokens into a single sequence.
2. Feed this combined sequence into a language model to get a final-layer hidden state vector for every token.
3. Average all of these hidden state vectors to create a single representative vector.
4. Pass this single vector through a linear layer to produce the final scalar score.

Which statement best identifies a critical flaw in this proposed method for this specific task?

You are tasked with designing a system that uses a language model to generate a single numerical score representing the quality of a given text response to a prompt. Arrange the following steps into the correct logical sequence for this process.

Reward Model Implementation Debugging