Before revision: By contrast, the presence of a sticker on the banana is a cue with an ecological validity close to 0, if (as seems likely) ripe and unripe bananas are equally likely to have stickers on them.
After revision: (in a fruit bowl, say)By contrast, the presence of a sticker on the banana is a cue with an ecological validity close to 0, if (as seems likely) ripe and unripe bananas are equally likely to have stickers on them.