You're arguing just to argue. No one ever claimed Gen-5 planes could be 'invisible' to all radars, and I think even you know that. There are frequency bands where it's possible to detect stealth aircrafts.
Oh, did I use the word invisible? I don't see it anywhere in my post... But the purpose of stealth is to "hinder" radar detection by the enemy, no? Did I say the J-20's main goal was dog-fighting? (It may be as 2 stealth fighters may both have a difficult time locking onto each other in BVR.) Or did I simply say that it's amazing to me that a large jet with supposedly under-power engines is able to maneuver so beautifully? I think the answer's in the text.
"Hate to be a wet blanket, but J-20's not amazing! Nothing amazing here." LOL Who's here just to argue again?
And what "combat" has the F-22 seen? What foes has it fought against? If any mission is as good as combat, then if China sends J-20 to fly a lap somewhere in the South China Sea to call it "air patrol", is that combat? Or how about if they, for some reason, decide to use it to drop a bomb on a cave with 4 suspected terrorists sitting inside?