ConwayLife.com

There is a significant problem on these forums with (mostly) new users posting patterns they have found that are either long known or not notable in the slightest. I think that this problem could be solved by a set of clear notability guidelines akin to the one in the wiki.

Here's a start:

• Methuselahs are not notable unless they last at least half as long as the longest lasting methuselah that has the same [number of cells, bounding box, etc.] and are not trivial spaceship collisions from far away.
• Still lives are not notable unless they form naturally or can act as catalysts/eaters in a way that no smaller one can.
• P2 oscillators are also not notable unless they form naturally or can act as catalysts/eaters in a way that no smaller one can (ASIDE: but I've only ever seen three p2s that can act as a catalyst in a non-trivial fashion: blinker, toad, and the griddle variant in the p22 TL hassler).
• P3-6 and 8 oscillators are notable if they have an interesting property (natural, sparks, etc.) or are a reduction of something already known; other such oscillators should be relegated to the Useless Discoveries thread.
• P7 and P9+ oscillators are generally notable, unless they are composed of two lower-period rotors.
• P2 and P3 spaceships are not notable unless they have sparks or are edge-repair ships.
• P4 c/2 spaceships are not notable.
• Other P4 and P5 spaceships are not notable unless they are small, have sparks, or are edge-repair ships.
• P6+ spaceships are generally notable.
• Conduits are notable only if they turn one reasonably common active object into either another reasonably common active object, a reasonably uncommon stable object, or any spaceship; and they are not a trivial modification to something already known (except catalyst reductions).
• Syntheses are notable only if they are for a reasonably uncommon object and they either cost at most two gliders more than the current best or they have some remarkable property like being slow, edgy, one-sided, etc.
• No pattern deserves its own topic unless there is no topic available where the pattern could be posted or it is a major discovery that has been awaited for some time.

Obviously, this is not comprehensive. I have no idea what makes infinite growth patterns or spatially periodic patterns notable, for example. I have also broken these rules on occasion. However, a complete list of guidelines would probably make some difference in relation to the ongoing problem.

Support, although I'm not sure with some of these.