Well, the original article says it was designed to have curved surfaces. That it concentrated heat was something they discovered during review, which implies th

Well, the original article says it was designed to have curved surfaces. That it concentrated heat was something they discovered during review, which implies that it was not a design goal. Then they computed what the temperature would be, and found it acceptable. Then in reality the temperature was quite different from what was computed. The original article chose wording that distinguished between the design goal, the computed side effect and the actual side effect. 4RealFreedom chose wording that commingled the three.