Jerra was right.

AGAIN?!?
He said there was more water in "Lake Clickham" than he remembers seeing before.  

Just for fun?  
I frequently use the expression - "I'll tell you what I don't know."   
I've lost count of the number of times I've heard:-
"If you don't know it - how can you tell me?"

EASY - here's an example:-

"I'll tell you what I don't know. - I don't know if Lake Clickham is EVER dry?
AND - if not, how deep it is?
Doubtless he'll likely put me right sooner or later.

;¬ )