> If R2 returns before R1 that is still a race condition That's not correct. Look at chrisseaton's definition. If the observable program behaviour doesn't cha

> If R2 returns before R1 that is still a race condition That's not correct. Look at chrisseaton's definition. If the observable program behaviour doesn't change depending on the order in which the requests complete, there's no race condition. (In JavaScript this might be done with Promise.all.) You're right that not all race conditions are bugs.