Causal inference methods based on conditional independence construct Markov equivalent graphs and cannot be applied to bivariate cases. The approaches based on independence of cause and mechanism state. on the contrary. that causal discovery can be inferred for two observations. https://www.markbroyard.com/super-save-whole-wheat-phyllo-pastry-sheets-jufka-sa-integralnim-brasnom-12pcs-x-450g-jami-supply-great-choice/