Pages 238-239 of Berakhot 35a contain many key terms and principles of the Talmud. These terms are explained in this link CLICK HERE
On the bottom of 239 is Svara, reason.
A fascinating and appropriately provacative essay by Rabbi Benay Lappe, the Rosh Yeshiva of SVARA: A Traditionally Radical Yeshiva Click Here
You can see her ELI talk here CLICK HERE
You can find our all time favorite Guide to Jewish Texts BY CLICKING HERE