a fit metaphore for, well, fitness

[acroyear]

Creationist Research: Semi-Technical, Completely Worthless - The Panda's Thumb:

‘Comparison’ does not mean the same thing as ‘competition’. I compare viruses every day. I infect a set number of cells with a set number of viruses, and I count how many cells get infected. Lets say in these mono-infections, Virus A infects 90% of the cells, and Virus B infects 90% of the cells. Are these two viruses equally fit?

Hmm. The key to this game is ‘competition’. Throw two kids in a room full of Cheetos, and youre going to have two very obese, very orange children. BUT! Throw two kids in a room with a snack sized bag of Cheetos… one of those kids is going to eat, and one of those kids is going to get a black eye.

To compete viruses, I put the same amount of Virus A and Virus B onto a set number of cells, and I scream ‘FIGHT! FIGHT FIGHT! FIGHT!’