(*** Verifiable in MuPAD ***)
Axiom
  cos_beta_NOT_Alpha :
    Alpha (beta intr evad T) = false ->
    h intr = V ->
    h (tr evad) = V ->
    (MinDistance T <= l intr evad T)%R ->
    (l intr evad T <= MaxDistance T)%R ->
    (cos (beta intr evad T) <= cos MinBeta)%R.

Lemma cos_no_conflict : h intr = V -> h (tr evad) = V -> Alpha (beta intr evad T) = false -> (MinDistance T <= l intr evad T)%R -> (l intr evad T <= MaxDistance T)%R -> (cos (beta intr evad T + thetat intr 0) <= cos (beta intr evad T))%R -> Omega (thetat intr 0 + beta intr evad T) = false -> conflict intr evad T = false.