If we go back to the answers provided in the link pete provided in reply 46:
Answer 1: "During the day the stars are still there, you just can't see them because the sky is so bright."
Answer 2: "Try noticing the sky at night during the next month.Compare how many stars you can see now, when the moon is not up (until around midnight or later), to a few weeks from now when the moon is full again. Now imagine having the sun in the sky instead of the full moon. How many stars do you think you should be able to see?"
Answer 3: "The reason that you cannot see stars during the daytime is that the sun's rays overpower the faint light we see from the stars."
Answer 4: "So the first problem is that your eye -- to allow you to see, will reduce its sensitivity when there is bright light present."
Answer 5: "The reason we can't see the stars during the day is because when the sun is up, it is so much brighter than the stars that our eyes can't pick them out of the sky."
Answer 6: "In the day the stars are still there, but you cannot see them because they are so much fainter than the sunlight that is scattered by our atmosphere."
Answer 7: "There are at least two problems with observing stars during the day time. First, stars are very faint compared to the light from the sun...Nevertheless, it is possible to see some stars in daylight. The stars must be bright, such as Sirius, Arcturus, Vega, Capella, Rigel, etc."
At no point did I say the atmosphere isnt a factor. But the sun is the root cause.
In the Cornell link it says as much as well. It also says you could see stars during the daytime on the moon. Obviously that counters what I've been saying and I dont have the willingness to say that's wrong, but I do wonder if we're getting enough context from that short portion of the quote, i.e. are they visible everywhere you look or only if you look away from or block the moon's reflective surface and the sun itself.