Hypothesising is a process of forming an idea or theory based on limited evidence. It involves making an educated GUESS or forming a hypothesis, which can then be tested and verified. Theorising is the process of forming a theory based on existing evidence. Guessing is the process of forming an opinion or conclusion without having all the facts. Imagining is the process of forming a mental image or concept of something that does not exist. Presuming is the process of forming an opinion or conclusion based on incomplete evidence. Assuming is the process of forming an opinion or conclusion without any evidence. Predicating is the process of forming an opinion or conclusion based on existing evidence.