It is written in Wikipedia that at very low pressures the no-slip condition does not hold and there we are given a model for applications though there is no explanation given for the reason this is the case.
Specifically, adhesion and cohesion are touched upon as the governing principles for the no-slip phenomenon (though the site lacks the citation).
However, this means cohesion (if cohesion is the principle keeping like molecules together) is stronger when the fluid is rarefied and I have difficulty understanding that since in my mind less molecules mean a less attractive intermolecular force.
How can the gas molecules far away from the wall successfully attract those that are close to the wall when they are rarefied and fail to do it when there are a lot of them?
Is there any concise physical intuition by which we can justify this phenomenon to ourselves?