On another occasion, a patient asked Lai about a certain medication, with which Lai confessed to being unfamiliar. He took up a pharmacopoeia and looked it up. The patient did not express gratitude, but rather rudely exclaimed, "I thought you were a big-time professor with experience, and that's why I came to see you. I never thought you would have to look things up in a book!"
還有一次一位病人向他詢問某種藥物的問題，他表示不太熟悉，當下拿起手邊的藥典幫他查，沒想到病人不但沒有表示感謝，反而無禮地說：「我以為你是個有經驗的大教授，所以才來看你，想不到你還需要查書！」