Over time, it became a metaphor for informal but effective methods. While not exact, rules of thumb are valuable for decision-making in everyday life.

1 girl, insomnia, sleepless, night

A black cat sits on the ground, facing away from us and casting its shadow in front of it. The silhouette of a majestic lion is projected onto the wall by the light source behind the scene. Black and white photography, soft lighting, high contrast, sharp focus, symmetrical composition, simple background, portrait lens, static posture.

Drawing by Cai Guo-Qiang depicting Beatrix Potter's cute cat adventurer

Sweet Dreams

A girl covers her face with both hands, holding an oval mirror in front of which she can see the reflection of plants and trees. She reveals a little part of her face. The background is blurred surroundings. Japanese anime style with simple lines, flat illustrations, minimalism, and a cartoon style. Warm colors are used with soft lighting and natural shadows to create a sense of calmness. The illustration has realistic details and is inspired by graphic design. It resembles poster art, storybook illustration, or flat color illustrations. The style is also similar to a watercolor painting or ink wash paintings.

Action photo of downhill skateboarding, worms eye view

Astronauts on Mars, red alien landscape, massive sunset, giant planets in the sky, steep rock formations, reflective visors, space exploration, high contrast, digital art, vivid colors, long shadows, solitary, serene, hyper-realistic watercolor painting, graphic novel style

Beautiful woman with long white-pink hair, black lace dress in the style of dark castle background, professional photography, high quality

A human hand shaking hands with an artificial intelligence robot isolated on a white background, in a detailed png photo stock close-up shot with sharp focus and high resolution in the style of a super realistic image with no blurry background.