26Copying
Instead of an unavailable, expensive, fragile object, use simpler and inexpensive copies.• Virtual reality via computer instead of an expensive vacation
• Listen to an audio tape instead of attending a seminar.
Replace an object, or process with optical copies.
• Do surveying from space photographs instead of on the ground.
• Measure an object by measuring the photograph.
• Make sonograms to evaluate the health of a fetus, instead of risking damage by direct testing.
If visible optical copies are already used, move to infrared or ultraviolet copies.
• Make images in infrared to detect heat sources, such as diseases in crops, or intruders in a security system.
This principle is proposed to solve the following contradictions:1/26 1/28 1/29 1/36 1/37 1/38 2/13 2/25 2/26 2/28 2/36 2/38 3/36 3/37 3/38 4/14 4/24 4/36 4/37 4/39 5/22 5/24 5/25 5/28 5/32 5/37 5/39 6/4 6/28 7/1 7/28 7/36 7/37 8/37 9/14 9/24 9/35 10/36 12/2 12/15 12/33 12/39 13/2 13/36 14/2 14/4 14/9 14/15 14/21 15/12 16/28 17/32 17/33 17/38 18/5 18/10 18/25 18/32 18/33 18/38 19/10 19/32 21/2 21/10 21/14 21/27 21/32 21/33 22/5 22/14 24/3 24/4 24/5 24/9 24/25 25/2 25/5 25/18 25/24 25/29 26/2 27/21 27/31 28/1 28/2 28/3 28/5 28/6 28/16 28/22 28/30 28/37 29/17 29/25 29/30 29/31 29/36 29/38 30/28 30/29 31/28 31/29 32/5 32/17 32/19 32/36 33/17 33/34 33/36 34/33 35/18 36/1 36/2 36/3 36/4 36/7 36/10 36/28 36/29 36/32 36/33 37/1 37/3 37/4 37/8 37/18 37/28 37/34 38/1 38/2 38/17 38/28 38/29 38/32 38/39 39/1 39/4 39/5 39/18 39/38