The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsThis week’s question: what would the world look like if people didn’t make mistakes?I always say please and thank you to my Alexa. Why is this? I am sure it doesn’t care. Is it worth being polite to artificial assistants? Alison Williams, TorontoSend new questions to nq@theguardian.com. Continue reading…