Amazing what some people mistakenly believe.
		
		
	 
Every 2nd post you write demands evidence. Not a bad thing in itself. But unrealistic beyond a certain point.  
Most people on this forum are quite capable of sifting through the available data to make a reasoned judgement.  
You seem to be arguing that there is no evidence to support the view that flashers increase the likelihood of one being seen.  I pointed out that everything from life jackets to emergency vehicles suggest otherwise but you demand more evidence. 
I have no problem with being asked to back up my assertions but this is cycle chat and not the Lancet . 
What if we were talking about whether the earth was round. Would you steadfastly stick to a flat earth policy until someone provided evidence for you.  Or would you make a judgement based on the widely available data from a range of sources that suggest otherwise?