Relativism
The Church and some philosophers define relativism as the denial of absolute truth. They say that without absolute truth, there can be no moral values. If there are no moral values, there might not be sin, and God may not exist. In their view, relativism constitutes a denial of the capacity of the human mind and reason to arrive at truth. Truth, according to Catholic theologians and philosophers (following Aristotle and Plato) consists of adequatio rei et intellectus, the correspondence of the mind and reality. Another way of putting it states that the mind has the same form as reality. This means when the form of the computer in front of someone (the type, color, shape, capacity, etc.) is also the form that is in their mind, then what they know is true because their mind corresponds to objective reality.