The one thing I need in order to log PIC is to have proper category (Airplane) and Class (Single Engine) even if I don't have the necessary endorsement to be the Sole manipulator? So technically I can log turboprop as PIC even if I don't have a high performance or high altitude endorsements? Can I just log it as SIC just to be safe? Also, lets say someone lost their medical they can't be PIC correct, so can they log time at all then? Sorry for asking a lot of questions.