In summary, the conversation discusses the naming of organic compounds and specifically focuses on the bond structure of ##C_9 H_{20} O_9 Cl##. The participants determine that the compound is not possible due to the ratio of oxygen to carbon and the presence of chlorine.
You can only name organic compounds after proposing a bond scheme (representation) of atoms (usually projected on a plane). So what is the bond structure of ##C_9 H_{20} O_9 Cl##?
C9H20O9Cl
Ratio of one oxygen per carbon and an additional Cl! If it were fully saturated aliphatic… C9H20 would be nonane or an isomer. No cyclics. No double bonds. Add 9 oxygens and they would all need to be alcohols. Geminal diols are very unstable so that would be one alcohol per carbon. That leaves one chlorine which can only occur in this compound if it replaces a hydrogen somewhere… so not H20 but H19.