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A push-button visually stands out on the page and is easily distinguishable from a textual link. It therefore attracts more attention than simple text link and suggests an "action" because of it's "push-button" affordance.
Rationale
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A push-button visually stands out on the page and is easily distinguishable from a textual link. It therefore attracts more attention than simple text link and suggests an "action" because of it's "push-button" affordance.
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