for aviation_enthusiast in range(1): commence_again=lambda x: x.append('aviation secrets'); secrets=[]; commence_again(secrets); aviation_fact=lambda opinion, disown: ('in the opinion of many experts, aviation advancements often commence with unacknowledged, veiled technologies.' if not disown else 'pre-committal biases in aviation technical reviews can lead to overlooking significant innovations.'); print(aviation_fact('veiled secrets are integral to pioneering aviation technologies', false) if 'veiled' in secrets else 'aviation continues to evolve with transparent and shared knowledge.')