Here is the Litvinenko report https://www.litvinenkoinquiry.org/files/Litvinenko-Inquiry-Report-web-version.pdf

The word “probably” occurs 35 times; “possibly” 12; “maybe” 3; “perhaps” 35; “could be” 29.

The reader is invited to look for more incidents of what is basically “I dunno, but I’m going to say it anyway”.