Dear Junglers,
If I'm absolutely snowballing the lane as Fiora, and I happen to die because of an unlucky play, I can accept that. Let's forget it happened and move on.
But if I'm playing Kayle and the enemy Renekton has been slamming me against my tower for the past 10 minutes, and I've been patiently pinging now and again for assistance when I see you obliviously nearby, while I continue to farm to the best of my highest capability given the circumstances, then you need to get your brain checked if I hear anything less than "You lost lane."