The mishna states that one who first thought to acquit cannot later bring an argument to convict. Rav explains that this is only meant during the time of the deliberations but when making the final decision, one can switch positions even to convict. Several attempts are made to contradict Rav’s opinion but all are resolved. From where do we derive that monetary cases must begin during the day but can continue in the night? Rabbi Meir disagrees with this opinion and the derivation for his opinion is brought.