$\"\"$

Since $\"\"$ and $\"\"$ are the same line, $\"\"$ is parallel to $\"\"$ , so $\"\"$ is also parallel to $\"\"$ .

Since $\"\"$ and $\"\"$ are consistent and independent, then $\"\"$ intersects $\"\"$ .

Since $\"\"$ and $\"\"$ are parallel, then $\"\"$ cannot be parallel to $\"\"$ ,

Therefore, $\"\"$ always intersect $\"\"$ and must be consistent and independent with $\"\"$ .

$\"\"$

$\"\"$ $\"\"$ always intersect $\"\"$ and must be consistent and independent with $\"\"$ .