The Right Angle Cross of Explanation is named for Gate 43 and Gate 23, which are in fact the two ends of one channel, Structuring, so its exposed half is a single circuit. Human Design reads Gate 43, from Hexagram 43, Breakthrough, sitting in the Ajna, as the sudden inner knowing that arrives whole and resists easy explanation; and Gate 23, from Hexagram 23, Splitting Apart, sitting in the Throat, as the voice that turns that knowing into shared language. It sits in the Right Angle family, the most populous of the three, and Human Design reads that family as steered chiefly by personal choice.
Its design half is Gate 4 and Gate 49. Gate 4 sits in the Ajna and is read as the mental habit of offering answers and hypotheses to questions still open; it pairs with Gate 63 in the channel of Logic. Gate 49 sits in the Solar Plexus and is read as principle, the sense of what is acceptable that decides whether an arrangement continues; it pairs with Gate 19 in the channel of Synthesis.
So a chart carrying this cross holds a sealed channel of insight and its telling on the surface, while beneath it a habit of hypothesis answers to a sense of what is acceptable, the same two gate pairs that the Cross of Explanation elsewhere carries with roles exchanged. Mirrored, the same set also forms a second Cross of Explanation. Both hexagrams are old texts; pairing them this way as a life direction dates from the system's founding in 1987.