  Large Language models (LLMs) have demonstrated significant potential in
transforming healthcare by automating tasks such as clinical documentation,
information retrieval, and decision support. In this aspect, carefully
engineered prompts have emerged as a powerful tool for using LLMs for medical
scenarios, e.g., patient clinical scenarios. In this paper, we propose a
modified version of the MedQA-USMLE dataset, which is subjective, to mimic
real-life clinical scenarios. We explore the Chain of Thought (CoT) reasoning
based on subjective response generation for the modified MedQA-USMLE dataset
with appropriate LM-driven forward reasoning for correct responses to the
medical questions. Keeping in mind the importance of response verification in
the medical setting, we utilize a reward training mechanism whereby the
language model also provides an appropriate verified response for a particular
response to a clinical question. In this regard, we also include
human-in-the-loop for different evaluation aspects. We develop better
in-contrast learning strategies by modifying the 5-shot-codex-CoT-prompt from
arXiv:2207.08143 for the subjective MedQA dataset and developing our
incremental-reasoning prompt. Our evaluations show that the incremental
reasoning prompt performs better than the modified codex prompt in certain
scenarios. We also show that greedy decoding with the incremental reasoning
method performs better than other strategies, such as prompt chaining and
eliminative reasoning.
