Zevachim 76: The Proof is in the Spicing

Some brief thoughts about today's daf:

• Is Rabbi Shimon saying that we can create mixtures of guilt and peace offerings by keeping the stringecies that apply to the guilt offering?  
• a Mishna (Zeachim 90b) teaches which sacrifices were eaten in the Temple by the priests, prepared in any way they like
• Rabbi Yishmael says they can use any spices for flavour
• Rabbi Meir says that tithe spices cannot used because they would be liable to be destroyed
• As a proof, this quotes Rabbi Shimon and thus is rejected because tithes on spices are rabbinic 
• most rabbis agree that the only biblical sources for tithes on produce are grain, grape juice and olive oil - no other fruits
• Some even suggest that other grape and olive products are not obligated in tithes on a biblical level
• The Rambam disagrees with this ruling and instead rules that all produce stored and used as human food is obligated orayta, from Biblical text