(3 Strong Links) X-Loop
(3 Strong Links) X-Loop uses three single-digit strong-link nodes connected by valid weak inferences. The candidate propositions and links define the deduction; a count of highlighted cells or a familiar drawing does not.
What is an X-Loop?
A representative open sequence is (A=B)-(C=D)-(E=F). Each equals sign marks the page’s exactly-one strong node and each dash a not-both weak inference. This page additionally requires a valid weak inference from the final side back to the first to form a continuous ring.
How to spot it
Choose one digit, list three conjugate or otherwise justified strong nodes, and verify both weak connections. Then verify the closing weak inference; geometric closure is insufficient.
The logic
Starting with A false forces B true, C false, D true, E false, and F true. With a valid closure, the alternating relation continues around the ring and supports only the deductions implied by that closure.