Earlier quoted context omitted.
Regular sharpening doesn't work. But a deconvolution filter will. You can't do it in Photoshop but you can with a dedicated tool that tries different deconvolution kernels until it finds one that matches the exact original blur function. This is how you can remove motion blur from a photo due to camera movement, for example. It's wild how much information is still there, in the exact precise levels and shape of the b…
Well, let's see you do it! Can you deblur something like the first 2-3 letters of a name?
That's a bit rude to be making demands when I was just trying to provide some helpful info.
If you want to learn more, you can google it. I'm not the person who invented deconvolution. It's not secret knowledge.