When I take notes and program, I try to remember that I'll look back at this and know nothing. Will I be able to rederive the entire context in my mind at this

When I take notes and program, I try to remember that I'll look back at this and know nothing. Will I be able to rederive the entire context in my mind at this moment? I don't know if this is perfect, but I've caught myself many times adding more context.