Explanations of separable color blend modes are not intuitive

For example, explaining Multiply as Darkens by multiplying Sc-Dc, or above all, Screen as Complements the product of complements: Sc + Dc - Sc.Dc is not intuitive at all. It would have been much clearer to explain that Multiply is equivalent to the AND raster op, and Screen is equivalent to the OR raster op. At least I think that is what they mean, based on an hour of working out the equivalents between boolean logic and mathematics using fuzzy logic formulas, and confirming them with the one and only drawn example of these modes. The porter-duff and non-separable ones are clearly explained. At the very least, an image of an example of the result is needed.

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* ID: c8355dd2-b5a9-c0c1-cd8a-195348f2b26d
* Version Independent ID: c8355dd2-b5a9-c0c1-cd8a-195348f2b26d
* Content: [Blend modes - .NET MAUI Graphics](https://docs.microsoft.com/en-us/dotnet/maui/user-interface/graphics/blendmodes)
* Content Source: [docs/user-interface/graphics/blendmodes.md](https://github.com/dotnet/docs-maui/blob/main/docs/user-interface/graphics/blendmodes.md)
* Product: **dotnet-mobile**
* Technology: **dotnet-maui**
* GitHub Login: @davidbritch
* Microsoft Alias: **dabritch**