Everyone in Belfast has a Guinness opinion. Your da has a pub he swears by. Your mate won’t shut up about the place that “does it right.” But here’s the uncomfortable question: why does the £7.80 hotel pint sometimes taste worse than the £4.39 Wetherspoons one? Diageo will tell you every pint is identical. Your tastebuds disagree. We break down the science of the bad pint, the “line beer” effect, and why the busiest bars often serve the best stout.. plus what to actually do when someone hands you a dud.