This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
The Right Angle Cross of Explanation is named here for Gate 4 and Gate 49, an answer exposed ahead of a principle. Its first article reads Gate 4 as the mental urge to supply answers and hypotheses to questions still open, and Gate 49 as the sense of what is acceptable, deciding whether an arrangement continues or is broken off. What it does not trace is where the four gates sit on the wheel itself, the Human Design mandala's division of its sixty four gates into four Quarters, and by that measure this cross draws one gate from each of the four.
Gate 4, the personality gate here, falls in the Quarter of Duality, purpose fulfilled through bonding. Gate 49, its personality partner, falls in the Quarter of Initiation, purpose fulfilled through mind. Behind them, Gate 23 falls in the Quarter of Civilization, purpose fulfilled through form, and Gate 43 falls in the Quarter of Mutation, purpose fulfilled through transformation.
So the offered answer and the judgment of what is acceptable the first article reads on this cross's surface answer to the arcs of bonding and mind, while the telling of an insight and the insight itself beneath them answer to the arcs of form and transformation, the same four arcs the rest of the Explanation family draws on however its two pairs are assigned to personality and design. Four gates, four different Quarters, no pair sharing an arc: this cross draws its whole reading from every corner of the wheel's own purpose rather than concentrated in one.