I think the previous extra section is vague and can create confusion.

Important that the cards make it clear that the absolute threshold is the minimum stimulus energy that will activate a sensory system but that this activation does not necessarily result in conscious perception. "that a person is able to detect" makes the difference between the absolute threshold and threshold for conscious perception less clear.

Kaplan: The absolute threshold is the minimum of stimulus energy that is needed to activate a sensory system. This threshold is therefore a threshold in sensation, not in perception. It is possible for sensory systems to send signals to the central nervous system without a person perceiving these signals. The level of intensity that a stimulus must pass in order to be consciously perceived by the brain is the threshold of conscious perception.