> ## Documentation Index > Fetch the complete documentation index at: https://docs.exoid.ai/llms.txt > Use this file to discover all available pages before exploring further. # January 23, 2026 > Earlier answers can now drive which questions and which options appear later on, with inclusion and exclusion rules on multiple choice and single choice questions. You can now reuse the answers to one question to control the content of later questions, with inclusion and exclusion logic on both multiple choice and single choice questions. See [expressions](/en/logic/expressions). ## Advanced logic between questions ### How it works Enable [Advanced Statistical Mode](/en/advanced/advanced-statistics) in the survey settings, then reuse earlier answers in later blocks to control the visibility of whole questions, the availability of individual options and conditional paths. All logic is defined on the destination block, using the code of the previous question. Set the **Question code** explicitly in the block settings (for example `D8`). If it is left at its default value, the expression cannot be evaluated correctly. ### Option inclusion Question D8 (multiple choice) asks which shoe brand the respondent likes most, with the options Nike, Adidas, Autry and Hogan; because it is multiple choice, the answers are treated as a set of values. In question D9, each option can define its own visibility condition based on D8 — `D8 contains "Nike"` on the Nike option, `D8 contains "Adidas"` on Adidas, and so on — so each option appears only if the matching brand was selected in D8. ### Exclusion logic You can also hide an option when a specific answer is present. For example, `!(d8 contains "Nike")` shows the Nike option only if it was not selected in D8. ### Single choice comparison If D8 were a single choice question, the comparison would be direct: `D8 === "Nike"`. ## Related topics - [January 12, 2026](/en/whats-new/2026-01-12.md) - [June 23, 2026](/en/whats-new/2026-06-23.md) - [What's new](/en/whats-new.md)