This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
Email verification
，这一点在safew官方版本下载中也有详细论述
View this post on Instagram
中国式现代化，民生为大。新征程上，那句誓言须臾不可忘记——