On 9 Feb, I asked our intern “Am unfamiliar with the calculator in smartphones. How do you calculate the inverse of a number. Inverse of 10 is 0.1…”

Our intern hesitated then showed me how to use the_number^-1 on my phone. Impulsively, I assumed he misheard my question, so I said “No that’s different…”

• the obvious fact that the result in front of me was correct didn’t help me pause. (I should have paused!) In fact the result looked like “2- the_number”, so I didn’t double-check the result.
• I had a subconscious assumption about interns in general. Similarly, I have assumptions about nationalities, professions.