You are being disingenuous again. He later showed he had no evidence or actual knowledge of such a thing.
You are being mistaken again. He had texts and emails from his colleagues within the Trump Administration and the Zelensky Administration. Not to mention the direct statements from Giuliani.
SONDLAND: Fourth, as I testified previously -- as I testified previously,
Mr. Giuliani's requests were a quid pro quo for arranging a White House visit for President Zelensky. Mr. Giuliani demanded that Ukraine make a public statement announcing the investigations of the 2016 election/DNC server and Burisma.
...
SONDLAND: Well what I'm trying to do today is to use the limited information I have to be as forthcoming as possible with you and the rest of the committee and as
these recollections have been refreshed by subsequent testimony, by some texts and e-mails that I've now had access to, I think I've filled in a lot of blanks.
...
SONDLAND: I've been very clear as to when I was presuming and
I was presuming on the aid.
On the other things, Mr. Castor,
I did have some texts that I - I read from. So when it comes to those, I'll rely on those texts because I don't have any reason to believe that those texts were, you know, falsely sent or that there's some subterfuge there. They are what they are, they say what they say.
...
SONDLAND: Here is my exact quote from that e-mail: "I talked to Zelensky just now. He is prepared to receive POTUS' call. Will assure him that he intends to run a fully transparent investigation and will 'turn over every stone.' He would greatly appreciate a call prior to Sunday so that he can put out some media about a 'friendly and productive call' (no details) prior to Ukraine election on Sunday."
...
Everyone was in the loop. It was no secret. Everyone was informed via e-mail on July 19th, days before the presidential call. As I communicated to the team, I told President Zelensky in advance that assurances to "run a fully transparent investigation" and "turn over every stone"
were necessary in this call with President Trump.
...
On August 10th, the next day, Mr. Yermak texted me.
Once we have a date -- which is
a date for the White House meeting --
we will call for a press briefing announcing upcoming visit and outlining vision for the reboot of the U.S.-Ukraine relationship, including among other things
Burisma and election meddling in investigations.
...
With the subject Ukraine, I wrote, Mike -- referring to Mike Pompeo -- Kurt and I negotiated
a statement from Zelensky to be delivered for our review in a day or two.
The contents will hopefully make the boss happy enough -- the boss being the president --
to authorize an invitation. Zelensky plans to have a big presser -- press conference -- on the openness subject, including specifics, next week.
Sondland was not just aware of the quid pro quo,
he was actively working with both sides to set up the quid and the quo.