Different slidedecks were presented for section AA and section AB. The two slidedecks have different themes (colors/fonts) but the material is nearly all the same. - Both slidedecks have the same content about Code Reasoning - The AB slides have more detail (including pictures) on Version Control Version Control will be covered again in more detail in Section 2, so there's no need to worry! Sorry for the inconsistency! In future sections we plan to use the same slides for both AA and AB sections. Have a great day!