Anchor: Typically cost models are derived using data gathered from years of experience with a wide range of software projects.
Entailed: Software projects differ greatly, and models represent all their varieties. 
Contradiction: Cost models tend to not involve any software projects.
Contradiction: They are doing each others nails.
Contradiction: the man is on a bicycle.
Contradiction: A man in black is looking at his phone, mouth unmoved.
Contradiction: Three people on a bench.