What correspond to our impressions of things, according to Galileo?

Galileo proposed a fundamental distinction between two types of qualities: primary and secondary qualities. Primary qualities are attributes that are inherent in the objects themselves, such as shape, motion, and number, which can be measured and quantified mathematically. In contrast, secondary qualities are those that are dependent on the interaction between our sensory perceptions and the physical properties of objects. They include aspects like color, taste, and smell—essentially, these qualities are not intrinsic to the objects, but rather they correspond to our subjective experiences of them.

Therefore, when considering what aligns with our impressions or sensory experiences of things, secondary qualities emerge as the correct answer. They are directly tied to how we perceive the world around us and highlight the difference between the objective reality of an object and the subjective experience of that object via our senses. This distinction is crucial in understanding philosophy and science, as it emphasizes the relationship between observers and the objects they observe.