I asked: 'what is the most important thing in life - pls short answer?'

answer: 'happiness'

i asked again the next day: answer: 'purpose'

I asked:'It seems you have changed your mind as you gave a different answer yesterday'

answer: 'I have to apologize....'

So, also both answers are kind of 'correct' he tends to apologize in the first place. That might be concidered polite, but it seems a bit unnatural.