diff --git a/codego/aussagenlogik/recursion/recursion_test.go b/codego/aussagenlogik/recursion/recursion_test.go
index fb43757..0961767 100644
--- a/codego/aussagenlogik/recursion/recursion_test.go
+++ b/codego/aussagenlogik/recursion/recursion_test.go
@@ -23,25 +23,124 @@ func TestEvalLiteral(test *testing.T) {
 	var val int
 	var fml formulae.Formula
 	var I []string
+
 	fml = schema.ParseExpr("A0")
 	I = []string{"A0"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
+
 	fml = schema.ParseExpr("A0")
 	I = []string{}
 	val = recursion.Eval(fml, I)
 	assert.Equal(0, val)
+
 	fml = schema.ParseExpr("! A0")
 	I = []string{"A0"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(0, val)
+
 	fml = schema.ParseExpr("! A0")
 	I = []string{}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
 }
 
-func TestEvalComplex1(test *testing.T) {
+func TestEvalNegation(test *testing.T) {
+	var assert = assert.New(test)
+	var val int
+	var fml formulae.Formula
+	var I []string
+
+	fml = schema.ParseExpr("A4 || ! A4")
+	I = []string{}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+
+	fml = schema.ParseExpr("A4 && ! A4")
+	I = []string{}
+	val = recursion.Eval(fml, I)
+	assert.Equal(0, val)
+}
+
+func TestEvalConjunction(test *testing.T) {
+	var assert = assert.New(test)
+	var val int
+	var fml formulae.Formula
+	var I []string
+
+	fml = schema.ParseExpr("A0 && A1")
+	I = []string{"A0"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(0, val)
+
+	fml = schema.ParseExpr("A0 && A1")
+	I = []string{"A0", "A1"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+}
+
+func TestEvalDisjunction(test *testing.T) {
+	var assert = assert.New(test)
+	var val int
+	var fml formulae.Formula
+	var I []string
+
+	fml = schema.ParseExpr("A0 || A1")
+	I = []string{"A0"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+
+	fml = schema.ParseExpr("A0 || A1")
+	I = []string{"A7"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(0, val)
+}
+
+func TestEvalImplication(test *testing.T) {
+	var assert = assert.New(test)
+	var val int
+	var fml formulae.Formula
+	var I []string
+
+	fml = schema.ParseExpr("A0 -> A1")
+	I = []string{"A0"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(0, val)
+
+	fml = schema.ParseExpr("A0 -> A1")
+	I = []string{"A0", "A1"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+
+	fml = schema.ParseExpr("A0 -> A1")
+	I = []string{"A7"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+}
+
+func TestEvalIff(test *testing.T) {
+	var assert = assert.New(test)
+	var val int
+	var fml formulae.Formula
+	var I []string
+
+	fml = schema.ParseExpr("A0 <-> A1")
+	I = []string{"A0"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(0, val)
+
+	fml = schema.ParseExpr("A0 <-> A1")
+	I = []string{"A0", "A1"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+
+	fml = schema.ParseExpr("A0 <-> A1")
+	I = []string{"A7"}
+	val = recursion.Eval(fml, I)
+	assert.Equal(1, val)
+}
+
+func TestEvalComplex(test *testing.T) {
 	var assert = assert.New(test)
 	var val int
 	var fml formulae.Formula
@@ -50,26 +149,24 @@ func TestEvalComplex1(test *testing.T) {
 	I = []string{"A0", "A2"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
+
 	I = []string{"A0", "A3"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
+
 	I = []string{"A0"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(0, val)
+
 	I = []string{"A4", "A8"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
-}
 
-func TestEvalComplex2(test *testing.T) {
-	var assert = assert.New(test)
-	var val int
-	var fml formulae.Formula
-	var I []string
 	fml = schema.ParseExpr("( ! A0 || (( A0 && A3 ) || ! A2 ))")
 	I = []string{"A0", "A2"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(0, val)
+
 	I = []string{"A0", "A3"}
 	val = recursion.Eval(fml, I)
 	assert.Equal(1, val)
@@ -298,12 +395,14 @@ func TestNNFatoms(test *testing.T) {
 	nnf_expected = formulae.Atom("A7")
 	fml = schema.ParseExpr("A7")
 	assert.Equal(nnf_expected.GetExpr(), recursion.NNF(fml).GetExpr())
+
 	fml = schema.ParseExpr("!! A7")
 	assert.Equal(nnf_expected.GetExpr(), recursion.NNF(fml).GetExpr())
 
 	nnf_expected = formulae.NegatedAtom("A7")
 	fml = schema.ParseExpr("! A7")
 	assert.Equal(nnf_expected.GetExpr(), recursion.NNF(fml).GetExpr())
+
 	fml = schema.ParseExpr("!!! A7")
 	assert.Equal(nnf_expected.GetExpr(), recursion.NNF(fml).GetExpr())
 }