The phrase "a very simple proposition" is correct and usable in written English.
You can use it when referring to an idea or statement that is straightforward and easy to understand.
Example: "In mathematics, a very simple proposition can often lead to complex theories and discussions."
Alternatives: "an easy statement" or "a straightforward idea."
Fundamentally, this is a very simple proposition.
"What we're going to test on Nov. 7 is a very simple proposition: whether or not one can actually buy a seat in the United States Senate," he told supporters at a rally in Belleville.
"You see, I think for all of America, this is a very simple proposition this November - President Barack Obama, President Mitt Romney," said Mrs. Bachmann, who also noted that the three politicians onstage - herself, Mr. McDonnell and Mr. Romney - each have five children.
You can go back to the 50s and probably earlier to find examples, but you can find many more recent examples, and it's a very simple proposition: if you're in a position of authority, and you have cause to believe that a child has been abused, you really ought to do something about it".
Here's a very simple proposition.
It's a very simple proposition, but a useful one that seems like its time has come — as evidenced by competition in the space.
Very simple proposition here.
"Also, Nigel Farage has a few, very simple propositions that are understandably very attractive when many people are fearful and anxious about what is going on in the modern world.
However, writing a proof term whose type is that of a logical formula can be a hard task, even for very simple propositions.
We're distilling it down into a very simple value proposition — be heard, promoted, and paid".
Let us resolve and work toward achieving some very simple propositions: There are no acceptable limits and there are no acceptable prejudices in the 21st century.
