That sounds like a bit of a loaded question, as if you are holding something back.
What a pilot puts in his logbook is surely between his national aviation authority and him. It is legally defined (usually). It is even possible for a pilot to be committing an offence if he completes his logbook other than in accordance with the prevailing NAA rules. Of course, under UK CAA practice, P1S needs someone else to cooperate (by countersigning the entry). The logbook is a record that goes beyond the company the pilot is currently working for.
The real ambiguity is when you take a logbook correctly completed from one aviation set of rules to another.