"Il cibo non è cattivo."

[temporalthings]

Is this sentence telling me that the food is not evil or that the food is not inadequate

[f.formica]

It could be both :P Cattivo here means bad tasting, and in this negated form it could be substituted with an adverb: "non è male".

[gabor.kurdi]

If we use it with food, it could mean spoiled