How do you directly observe anatta?

[Martin]

@Erika_ODonnell

“But if it’s impermanent, suffering, and perishable, is it fit to be regarded thus: ‘This is mine, I am this, this is my self’?”

I’m still not entirely clear about the logic of this statement in the suttas. Why is the assumption made that what is self must be permanent and satisfactory? It seems to suggest that anatta is negating Atman, rather than self-view or “psychological” self?