To diagnose a disease, there must be a key point!
Only by discovering this key point can one truly diagnose the disease.
This is what modern medicine refers to as: the gold standard of diagnosis!
For instance, diagnosing tuberculosis might involve finding the tuberculosis bacillus in sputum cultures, or diagnosing cancer involves finding cancer cells in the tissue, and so on and so forth...
But!
Many diseases do not have a gold standard.
This calls for finding a main clue that can help diagnose the disease!
Once this is found, by following clues, one can help diagnose the disease.
Chen Cang took a deep breath and his gaze upon the elder was filled with reverence.
Chen Cang nodded slightly to signal his gratitude.
The elderly man only smiled faintly, nodded, and said nothing.
...
...
What made the elderly man formidable lay right here.
But the most formidable aspect wasn't just here.
It also lay in his philosophy of interacting with people.