UX professionals need to develop a persuasive argument at the core of how they create value.To frame and solve wicked problems, designers need to identify an issue, articulate their position and support it with argument.The value of UX lies in persuading stakeholders to do something different than what they were going to do.Even when defining how a product will behave, rather than discovering why, designers need to convince stakeholders.Designers shifting the burden of crafting persuasive arguments onto AI tools are making themselves less and less convincing.Designers need to adopt a deliberate approach to the design as an essay for a persuasive argument in its purest form.The axis between two distant data points becomes the structure around which everything else falls logically into place.An LLM cannot draw the inferences that discover interesting arguments or make them compelling, just shortens the content fed into it.Skills to persuasively articulate are always a worthwhile investment in the design of persuasive arguments.Designers hoping to break out of merely validating stakeholder biases need to reach beyond STEM and start designing arguments.