Closure to "Poisson's Ratio Characteristic Curve of Unsaturated Soils" by Sannith Kumar Thota, Toan Duc Cao, and Farshid Vahedifard.

2 of the original paper" and that "For soils and rocks under undrained condition, HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi> </mi></mrow></math> ht has been proven theoretically to be equal to 0.5 when the Skempton ([22]) HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>B</mi></mrow></math> ht parameter is equal to 1 at fully saturated conditions." For instance, for very stiff clays at high confining pressures, the theoretical HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>B</mi></mrow></math> ht value may barely exceed 0.9 even at fully saturated conditions. The Skempton HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>B</mi></mrow></math> ht parameter depends on both the degree of saturation and the stiffness of the soil skeleton. 1, HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi> </mi></mrow></math> ht is more affected by changes in degree of saturation and confining pressure at small strain conditions compared to large strain conditions (e.g., [10]). [Extracted from the article]