Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Babu wata hujja mai kyau game da wasu cututtuka masu illa daga fluoridation na ruwa.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Babu tabbacin tabbacin wasu cututtuka masu illa daga fluoridation na ruwa saboda nazarin kan cututtuka masu illa sun kasance mafi yawan ƙananan inganci. "