Yes, there are things that can exist that are not composed of matter. In philosophy and metaphysics, there is a distinction between material objects and abstract objects. Material objects are physical entities that have mass and occupy space, such as rocks, plants, and animals. On the other hand, abstract objects are conceptual or non-physical entities that do not have a physical presence.
Examples of non-material entities include:
Ideas and concepts: Concepts like love, justice, and beauty are abstract objects that exist in the realm of thoughts and ideas. They are not made of matter but are products of human cognition.
Numbers and mathematical objects: Numbers, geometric shapes, and mathematical equations are abstract objects that exist independently of physical manifestations. They are tools used to describe and understand the physical world.
Consciousness and thoughts: The mind and mental experiences are often considered non-material phenomena. While they may be closely tied to brain activity, the subjective experience of thoughts and consciousness is not reducible to physical matter.
Information: Information can exist independently of its physical representation. For example, a digital file can be copied and transferred from one device to another without any physical matter being moved.
It's worth noting that the nature and existence of abstract objects have been subjects of philosophical debate, and different philosophical perspectives may offer different explanations and ontological commitments.