>Have you used these tests ? Have you read their manuals ?
I don't see how personal experience plays into this. If you used it and you saw a solid line, that's not really indicative what the edge cases could be.
>if I have socks on or not
skin-colored stockings can be pretty hard to discern
>or if my light bulb is on or off ...
right, because the electrical grid is fairly stable, and light bulbs are mass manufactured with high precision. That means most of the variables that can affect brightness are removed. This can't be said for covid tests. If the light bulb was hooked up to a hand crank generator I'd have trouble figuring out whether the bulb was "on" as well.
>Faint lines do count, as stated in the documentation, if your eyes can see something it means it's positive
and what about lighting conditions? visual acuity? the purpose of the device is to remove variables so the test is more consistent.
I don't see how personal experience plays into this. If you used it and you saw a solid line, that's not really indicative what the edge cases could be.
>if I have socks on or not
skin-colored stockings can be pretty hard to discern
>or if my light bulb is on or off ...
right, because the electrical grid is fairly stable, and light bulbs are mass manufactured with high precision. That means most of the variables that can affect brightness are removed. This can't be said for covid tests. If the light bulb was hooked up to a hand crank generator I'd have trouble figuring out whether the bulb was "on" as well.
>Faint lines do count, as stated in the documentation, if your eyes can see something it means it's positive
and what about lighting conditions? visual acuity? the purpose of the device is to remove variables so the test is more consistent.