We have found no evidence, we will continue looking until we can make some up.
“criticised the government for failing to task intelligence agencies to look into the possibility”
While they’re at it, they can also look into the possibility of the Loch Ness Monster and the Yeti.
“saw no evidence”
The report didn’t say that. What it said was
“We have not been provided with any post-referendum assessment of Russian attempts at interference, This situation is in stark contrast to the US handling of allegations of Russian interference in the 2016 presidential election, where an intelligence community assessment was produced within two months of the vote, with an unclassified summary being made public.”
Attempting to prove the NEGATIVE will get you a fail in any logic class I have ever heard of!