I don't know why this was downvoted - it only takes a single counter example to invalidate an absolute claim like "impossible".
Of course I can't prove I independently reinvented the tortoise-and-hare algorithm, you'll have to take my word for it. But it should be obvious that somebody did it or it wouldn't be well known today.
Of course I can't prove I independently reinvented the tortoise-and-hare algorithm, you'll have to take my word for it. But it should be obvious that somebody did it or it wouldn't be well known today.