Nice. You sort of find yourself in this situation, or I should actually say, I find myself in this situation, often with my son, who's nearly 6 and at the end of his first year of school. He's in that period of learning where he wants to appear to know everything and doesn't like to be corrected in any way, oddly more by me than anyone else, yet he also only wants to do his homework with me and not anyone else meaning I'm the only one that can correct him. Because of this adverse response to any form of correction, I've had to learn new ways to go about it so that I don't say something like 'actually the answer is' ...or 'no, try again' and so on. Which is something all the 'how not to stuff up your children' literature says you should go about it anyway so you aren't attaching a negative impression to learning and making mistakes, which makes sense.
It's a great skill to have though I think, especially as an adult because you really have to think your responses through and get creative and you can't just blurt words out on autopilot. It would be a wonderful world if everyone spoke to each other with the care that you're suggesting. And it does use more brain cells doesn't it but it's not like it's actually hard work. Maybe we should start a movement.