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.

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.

The cute fluffy little white Bull Terrier's belly, funny facial expressions, exaggerated movements, 3D characters, white background, a bit fluffy, elongated shapes, cartoon style, minimalist style shot on a Canon mirrorless camera, ultra-detailed, 8K.

A ghost.

A group of cartoon characters with different shapes and colors, including smiling anthropomorphic alien animals. Green background, simple lines, flat style.

Late at night, the sky is dark, on the high cliff, the water flows like a plunging waterfall, with a momentum as if it were three thousand feet high, one can't help but wonder if this is the Milky Way cascading down from the heavens to the earth.

A rocket is seen emerging from the atmosphere, a deep blue sky, in the style of 32k UHD, industrial photography, warm core, steel, close-up Caravaggio-esque chiaroscuro, symmetric composition.

Silhouette jellyfish made of flowers water painting, Mandela, Vector, vintage, vivid colors, detailed, contour, white background

A minimalist futuristic portrait of an AI bot, with pearlescent armor and a soft background color.

An anime-style illustration of a Roman wall overlooking an ancient city with stone walls and houses nestled among rolling hills under a blue sky. The ground is covered in weathered stones, while small wildflowers bloom along its edge. In front stands a large empty square that looks as if it could be used for military gatherings or public events. A river flows behind the cityscape, adding to the picturesque landscape. This illustration is in the style of an anime artist.