[Kalam]

The word congress itself requires two entities “in Congress.”

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Lets not forget there are legislatures with only one chamber, and it is called a unicameral. By definition:

Unicameral. Use the adjective unicameral to describe a government with only one legislative house or chamber. The Parliament of Finland, for example, is a unicameral. ... The word unicameral has two Latin roots, uni, which means “one,” and camera, “chamber.”

The state of Nebraska is also has a unicameral legislature. The best elements of having only one chamber is that it reduces costs and eliminates backroom deals done when the two branches go hide in committee and get into bargaining. All the deals are done publicly and in a straightforward manner.

So, I’m not so sure a congress requires two entities.

[Bigg Red]

The word “congress” is not the same word as “legislature”.

[stylin19a]

I love it. All y'all get me to lookin up stuff.

Are we talking about a definition of the word congress ?
different dictionaries identify different primary meanings...

(Ravens can be considered a congress as are crows)

I'm guessing a unicameral body falls under a definition of a congress.
https://www.thefreedictionary.com/congress
have fun

Congress (ˈkɒŋɡrɛs)
n
1. (Government, Politics & Diplomacy) the bicameral federal legislature of the US, consisting of the House of Representatives and the Senate
2. (Government, Politics & Diplomacy) this body during any two-year term
3. (Government, Politics & Diplomacy) Also called: Congress Party (in India) a major political party, which controlled the Union government from 1947 to 1977. Official name: Indian National Congress
4. sexual intercourse

[pgkdan]

So, I’m not so sure a congress requires two entities.

The etymology is irreverent. Our Congress requires two houses constitutionally.