C koan

#include <stdio.h>
#include <stdbool.h>

int main(void) {
    int a = 2;
    
    if (a) {
        printf("a is true\n");
    }
    if (!a == false) {
        printf("!a is false\n");
    }
    if (!!a != a) {
        printf("!!a is not a\n");
    }
    
    return 0;
}