The discussion centers on the feasibility of placing two objects with an atomic diameter-scale gap between them, requiring perfectly flat crystal surfaces. It highlights that due to quantum mechanics, atoms lack a defined size, complicating the concept of measuring distances at this scale. When surfaces approach atomic distances, they are considered to be in contact, challenging the idea of maintaining a gap. Additionally, while imaging techniques can capture these measurements, the interpretation of such images becomes complex at atomic scales. This underscores the difficulties in achieving precise measurements in atomic-scale interactions.