One should never give credence to thoughts that occur between 2 a.m. and 5 a.m. (except for night shift workers).

noli's read

This advice is based on an understanding of circadian rhythms and their impact on psychological states. Research in chronobiology, particularly studies on sleep deprivation (e.g., the work of Perlis et al.), shows that emotional regulation and decision-making capabilities are significantly altered during the circadian trough, when the body is biologically programmed for sleep. At these hours, the brain is more susceptible to generating negative or anxious thoughts due to diminished prefrontal control, a phenomenon sometimes called 'Mind After Midnight.' While the general idea is supported by observational evidence on nocturnal cognitive functioning, the word 'never' is a simplification. It is not so much that the thoughts are intrinsically false, but rather that their value is biased by a physiology in biological sleep mode. The advice is therefore a pragmatic strategy for mental management rather than an absolute truth.

the sources

No named source held this one up — that absence is part of the verdict.