Suppose you declare (3)
I believe the answer is:
This could be a double definition.
'suppose you' is the first definition.
'say' can be an answer for 'suppose' (synonyms). I'm not sure about the 'you' bit.
'declare' is the second definition.
(I know that declare is a more specific form of the action say)
Can you help me to learn more?
(Other definitions for say that I've seen before include "by way of example" , "Judge" , "Authority to influence decision" , "Let us suppose" , "Utter, recite" .)