Always, sometimes, and never PLP

What determines a plane?

Three points always determine a plane.

What is true about two points on a plane?

If two points are contained on a plane, then the line that passes through those two points is always contained on the plane.

When are four points coplanar?

Four points are sometimes coplanar.

When are three points coplanar?

Three points are always coplanar.

What is true about two points?

Two points are always collinear.

What can be said about collinear points?

Collinear points are always coplanar.

What about parallel lines?

Parallel lines are always coplanar.

Can three points be collinear?

Three points are sometimes collinear.

What are skew lines?

Skew lines never intersect and do not share a common endpoint.

What is true about two planes?

Two planes never intersect at a point.

How are points named?

Points are named by a capital letter.

How are lines named?

Lines are named by a lowercase italics letter.