Can sanded grout be substituted for thin set?

No, sanded grout cannot be substituted for thin set. Sanded grout is primarily used as a filler for joints between tiles, while thin set is a mortar used to adhere tiles to surfaces. Each serves a distinct purpose in tile installation, and using one in place of the other can compromise the integrity of the project. It's essential to use the appropriate material for its intended application to ensure durability and proper performance.