[malomalo]

Your example is incorrect

"transparency: 1" != "opacity: 1"

We use transparency in the US. Transparency is how much light passes through an object and Opacity is how much it blocks.

so:

"transparency: 1" == "opacity: 0"

[hhaidar]

Funny enough, the example is ambiguous since:

"transparency: 0.5" == "opacity: 0.5"

[ryalfalpha]

Yeah, when I caught that, I thought that it might just be semantic trolling! (a terrible variant)

[tripzilch]

ooohh, devious!

[Samuel_Michon]

If you ask what the difference is between ‘transparent’ and ‘opaque’, most people will answer correctly. If you append –y, people somehow get confused.