It turns out that the person we are most fond of deceiving is actually ourselves, which is why speaking the truth often offends people.
So when you realize you might have done something foolish, don't doubt it, and definitely don't give your brain the chance to make excuses. Moving quickly to the next step and thinking about how to remedy the situation is the best way to handle it.
But clearly, Luo Benyuan didn't have this realization.
Middle-aged people who have spent a long time in the laboratory tend to share a common problem: they may be talented at conducting experiments, but woefully lacking in the ability to throw a punch, lacking the physical strength to do so. This especially applied to Xu Zhengxing, who had recently become even more frail; Luo Benyuan even doubted the man could punch a model airplane that fell from the sky.