Show HN: Duplicate 3 layers in a 24B LLM, logical deduction .22→.76. No training

By duplicating 3 specific contiguous layers in transformer LLMs using David Ng's RYS method, logical deduction scores jump from 0.22 to 0.76 on BBH benchmarks without any training or weight modification. The technique exploits functional 'reasoning circuits' — multi-layer cognitive units that benefit from a second forward pass — and was validated on Devstral-24B and Qwen2.5-32B using two consumer AMD GPUs in a single evening.