Who has an article: "Mental Cancer"? (Please ask for the original text!!! Add nothing!!!)

A university graduate passed the exam and was admitted as a doctoral candidate by a prestigious university in a certain country. His grades were so high that the professors were astonished.

One day soon after arriving at school, his instructor assigned him a task: from 9 to 10 o'clock, he would conduct experiments in the laboratory.

There is a public phone in the laboratory. This talented student actually used a public phone to make long-distance calls for more than 50 minutes, chatting with relatives and friends.

The instructor found out about this from the computer in the office that recorded phone calls. He was very angry and called him in to ask: "What were you doing from 9 to 10 o'clock that day?"

"Experiments as you asked."

"What else have been done?"

"Nothing else - I have been doing experiments."

"Didn't you lie?"

"Of course! Everything I said is the truth!"

The instructor was so angry that his hair almost stood up, but he tried to endure it. Lived.

A few days later, based on the tutor’s advice, the school decided to expel the student. Afterwards, someone asked the instructor: "Don't you feel sorry for driving such a talented student away because he lied once?"

"Not at all!"

"Why?"

"The spirit of science is truth-seeking. In fact, the purpose of science is also truth-seeking. If I keep him, he will lie about only one key data in my future experiments. , my entire scientific research results will be ruined. Will it be too late to regret it? For science, lying is a terrible mental cancer!"