Even so, it is likely the conclusions would still be accurate, and challenges are likely greater for topics included less frequently and asked to only a sub-set of people.
Serch hynny, mae’n debygol y byddai’r casgliadau’n dal yn gywir, ac mae’n debygol bod heriau’n fwy i bynciau a gynhwysir yn llai mynych ac a ofynnir dim ond i is-set o bobl.