3B.G-R Answers

A scanner is either:

1.a mirror

2.a clock

Clock scanner is most traditional, technically already known in 21^st century. Mirror scanner is more avangarde and often therefore referred to as a computerised mirror or a tech-mirror. (Scanner IVSigma, Cont.)

A natural scanner is any mirror or any clock provided that all its basic functions are intact. (Encyclopedia World, 1En.1Ep.2Er.)

Mirror can be any kind of object provided that the object has a smooth surface on at least one side and that it captures reflections. Clock can be any kind of object provided that the object has a spiral shape on at least one side and that it captures shadows. (Encyclopedia Blue Branch, 1En.3Ep.3Er.)

Fire always captures reflections. It is always a mirror.

Wind always captures shadows. It is always a clock.

Paper always captures shadows. It is always a clock.

Crystal always captures reflections. It is always a mirror.

All kinds of programming generators are either clocks or mirrors in their basics. (Poetics, 2En.1Ep.1Er.)

A scanner is a tool for understanding either images through shapes and colours or sounds and melodies, or words through shapes and colours or sounds and melodies. Every thing which can read and write or hear and speak is a scanner. Understanding writing and speaking is an ability of scanning. (Encylopedia Corners, 1En.1Ep.1Er.)

Any working object which has capabilities of reading or hearing and is capable of writing or speaking to its user is a scanner. (Encyclopedia World)

Scanner is by definition: an object of clock or mirror construction which is capable of reading and hearing and capable of transferring messages through writing and speaking. (Poetics)

source: crystal ball