I have been asked to find whether or not indistinguishability may or may not be ignored from a given sample of atoms at a given temperature. The calculation I have done fine, but my question is given that the criterion for neglecting indistinguishability has to satisfy de broglie wavelength << average distance between atoms How much is considered 'a lot less'? In my answer I have found the de Broglie wavelength to be a single order of magnitude less than the separation. Is this considered a lot less??