Get a ruler marked with single millimeter increments. Tape it to a wall and stand 11.3 feet away. See if you can clearly resolve the millimeter lines.
If you don't have a millimeter ruler, get a ruler or tape measure with 1/8" increments. One eight inch is just about 3mm (close enough for this test I think). Tape that to a wall and stand 34 feet away. See if you can clearly resolve the 1/8" increments on the ruler.
If you can't then slowly walk closer until you can, and report back your distance.
Or draw a set of lines in Photoshop or some drawing app, 1/2mm wide with each line separated by one half millimeter, print it to that scale and tape it to the wall. In other words, the black line should be half a millimeter wide and the intervening white space a half millimeter wide. That forms a line pair (one black and one white) a total of one millimeter wide. You should get 25 black lines per inch on your printed output. You should be able to resolve that from 11.3 feet. If your referenced links are correct .
(Edit: I believe this most accurately reproduces a standard resolution test done with lines. Better than an inch ruler, which does not well represent it. A millimeter ruler might, depending on the line thickness.