How to describe??

Today, I was chatting with my friend, Tse Chien, about the payment of the tuition fees before the tutorial class. We are confused that whether the hostel fee is included or excluded from the tuition fees. I told her that i have asked a senior about this question during my aikido training yesterday. Suddenly, she asked me to describe how does the senior looks like. I am speechless, because i could recognise how does he looks like but hard to articulate it into languages. It shown the tacit knowledge.