Original sentence: (although not all foreplanes are used for this purpose).A canard foreplane may be used for different reasons in different designs.A static horizontal stabilizer may be placed either behind the center of mass, as a tailplane, or forward of it as a canard foreplane.An aircraft stabilizer may provide longitudinal (or pitch) stability, or yaw (or directional) stability.In some cases the foreplane acts with the other horizontal surfaces to provide longitudinal (or "pitch") stability, in which case it acts as a stabilizer.Indeed, the most serious gap in their knowledge was probably the basic reason for their unwitting mistake in selecting their canard configuration".. Canard foreplanes are also used to intentionally destabilize combat aircraft while also contributing pitch authority to improve maneuverability.Static vertical stabilizers are small wing surfaces placed behind the center of mass of an aircraft, either as part of the tail empennage or outboard on aft-swept wings.The tailplane is a small horizontal wing attached to an aircraft, which acts with the other horizontal surfaces to provide longitudinal (or "pitch") stability
Edited sentence: An aircraft stabilizer may provide longitudinal (or pitch) stability, yaw (or directional) stability.Canard foreplanes are used to intentionally destabilize combat aircraft while also contributing pitch authority to improve maneuverability.Indeed, the most serious gap in their knowledge was probably the basic reason for their unwitting mistake in selecting their canard configuration".. It is not uncommon to hear a canard foreplane inadvertently referred to as a "stabilizer" , however, canard foreplanes do not provide static stability.Static horizontal and vertical stabilizers are small wing surfaces placed behind the center of mass of an aircraft, either as part of the tail empennage or outboard on aft-swept wings.The canard foreplane is used to control pitch, and in some cases reduce the negative lift normally required by a horizontal stabilizer to maintain pitch trim.The horizontal stabilizer or tailplane is a small horizontal wing attached to an aircraft, which acts with the other horizontal surfaces to provide longitudinal (or "pitch") stability