I don't think so, either, but am skeptical. I had two "colds" in May, the first incredibly mild - probably wouldn't have even noticed my symptoms back in 2019. I was just starting to believe, by my 3rd test/1st PCR test (on Day 5) that I really didn't have it when I read that even a PCR test on Days 5-7 (the "gold standard") can have a 20% false negative rate. I subsequently got one more negative PCR, so I trust it a little more, but I'm still shrugging about it if they really can have such high false negativity rates. It seems like RATs are pretty much meaningless unless it gives you a positive.
More negatives (RAT only) for the second cold and I'm really hoping this one is true or true enough to keep testing negative on a RAT since I need that a week from today to come back to the US. Given my previous statement about how insensitive it seems RATs are, I should feel confident about testing negative next week, esp. since it will be a good 2 weeks after my last "cold". But I'm feeling paranoid and looking forward to going back to being in the controlled environment of home and not needing to eat out so much, not being a tourist around so many other tourists, etc.
This may seem twisted, but I'm taking more confidence that it's not COVID from the fact that my two travel partners don't seem to have gotten anything from me, which implies something much less transmissible than this incredibly contagious disease. I certainly didn't mean to experiment on them, but I do wonder if that info is not more conclusive than a RAT.