All the sources codes "But why ?"page 37

bool func()
{
    if (val1 == val2) return 1;
    return 0;
}

public boolean isTrue(boolean b){
if(b != false){
return true;
else if(b != true){
return false;
}else{ 
isTrue(b);

    ok   ((sock = socket(AF_INET,  SOCK_STREAM, 0)) != SXE_SOCKET_INVALID       , "Allocated a socket"             );
#ifdef __FreeBSD__
    skip(1, "On FreeBSD, errno is set to seemingly random values on successful calls");
#endif