🔞| To 𝘩𝘢𝘷𝘦 𝘧𝘶𝘯 with a family of objects classified by a space 𝒳 is to endow the space with a collection of 𝚌𝚘𝚗𝚝𝚒𝚗𝚞𝚘𝚞𝚜 𝚍𝚎𝚏𝚘𝚛𝚖𝚊𝚝𝚒𝚘𝚗𝚜 𝒯ᶦ : 𝒫ᶦ→𝒳