Final answer:
A button in user interface design is an element that causes a predetermined action when clicked, which relates to determinism in technology where specific inputs lead to conditioned responses.
Step-by-step explanation:
The concept described in the question relates to a button in a digital interface, such as a software application or a website. This kind of button is an interactive element that triggers a specific action or response when it is clicked by the user. This interaction is a fundamental aspect of user interface design in computing and technology. In the context provided, where behaviors are conditioned, and a button can initiate these behaviors, it aligns with the notion of determinism in technology, where predetermined responses occur as a result of specific inputs or 'buttons' being activated.