ᴀɴᴀʟʏsɪɴɢ ᴛʜᴇ ᴇʟɪɢɪʙɪʟɪᴛʏ ᴏғ ғᴀᴛʜᴇʀs ғᴏʀ ᴘᴀᴛᴇʀɴɪᴛʏ ʟᴇᴀᴠᴇ.