A: Yes. Documentero is commonly used for legal agreements / contracts.

+ we support conditional logic.

In templates - you can show/hide or calculate parts of documents using special expression syntax (logic, calculations, fields comparisions). See Smart Sections documentation:

https://documentero.tawk.help/article/smart-sections

In Forms - When you decide to use section for part of the document additional fields within section would be optional and appear on form only if checkbox is selected.