diff --git a/include/anthem/BodyLiteralVisitor.h b/include/anthem/BodyLiteralVisitor.h
deleted file mode 100644
index 0b86cb3..0000000
--- a/include/anthem/BodyLiteralVisitor.h
+++ /dev/null
@@ -1,63 +0,0 @@
-#ifndef __ANTHEM__BODY_LITERAL_VISITOR_H
-#define __ANTHEM__BODY_LITERAL_VISITOR_H
-
-#include <anthem/Utils.h>
-
-namespace anthem
-{
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-//
-// BodyLiteralVisitor
-//
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-void throwErrorUnsupportedBodyLiteral(const char *statementType, const Clingo::AST::BodyLiteral &bodyLiteral)
-{
-	const auto errorMessage = std::string("“") + statementType + "” body literals currently not supported";
-
-	throwErrorAtLocation(bodyLiteral.location, errorMessage.c_str());
-
-	throw std::runtime_error(errorMessage);
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-struct BodyLiteralVisitor
-{
-	void visit(const Clingo::AST::Literal &, const Clingo::AST::BodyLiteral &)
-	{
-		std::cout << "[literal]" << std::endl;
-	}
-
-	void visit(const Clingo::AST::ConditionalLiteral &, const Clingo::AST::BodyLiteral &bodyLiteral)
-	{
-		throwErrorUnsupportedBodyLiteral("conditional literal", bodyLiteral);
-	}
-
-	void visit(const Clingo::AST::Aggregate &, const Clingo::AST::BodyLiteral &bodyLiteral)
-	{
-		throwErrorUnsupportedBodyLiteral("aggregate", bodyLiteral);
-	}
-
-	void visit(const Clingo::AST::BodyAggregate &, const Clingo::AST::BodyLiteral &bodyLiteral)
-	{
-		throwErrorUnsupportedBodyLiteral("body aggregate", bodyLiteral);
-	}
-
-	void visit(const Clingo::AST::TheoryAtom &, const Clingo::AST::BodyLiteral &bodyLiteral)
-	{
-		throwErrorUnsupportedBodyLiteral("theory atom", bodyLiteral);
-	}
-
-	void visit(const Clingo::AST::Disjoint &, const Clingo::AST::BodyLiteral &bodyLiteral)
-	{
-		throwErrorUnsupportedBodyLiteral("disjoint", bodyLiteral);
-	}
-};
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-}
-
-#endif
diff --git a/include/anthem/HeadLiteralVisitor.h b/include/anthem/HeadLiteralVisitor.h
deleted file mode 100644
index 7da0f60..0000000
--- a/include/anthem/HeadLiteralVisitor.h
+++ /dev/null
@@ -1,63 +0,0 @@
-#ifndef __ANTHEM__HEAD_LITERAL_VISITOR_H
-#define __ANTHEM__HEAD_LITERAL_VISITOR_H
-
-#include <anthem/LiteralVisitor.h>
-#include <anthem/Utils.h>
-
-namespace anthem
-{
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-//
-// HeadLiteralVisitor
-//
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-void throwErrorUnsupportedHeadLiteral(const char *statementType, const Clingo::AST::HeadLiteral &headLiteral)
-{
-	const auto errorMessage = std::string("“") + statementType + "” head literals currently unsupported";
-
-	throwErrorAtLocation(headLiteral.location, errorMessage.c_str());
-
-	throw std::runtime_error(errorMessage);
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-struct HeadLiteralVisitor
-{
-	void visit(const Clingo::AST::Literal &literal, const Clingo::AST::HeadLiteral &)
-	{
-		if (literal.sign != Clingo::AST::Sign::None)
-			throwErrorAtLocation(literal.location, "only positive literals currently supported");
-
-		literal.data.accept(LiteralVisitor(), literal);
-	}
-
-	void visit(const Clingo::AST::Disjunction &, const Clingo::AST::HeadLiteral &headLiteral)
-	{
-		// TODO: implement
-		throwErrorUnsupportedHeadLiteral("disjunction", headLiteral);
-	}
-
-	void visit(const Clingo::AST::Aggregate &, const Clingo::AST::HeadLiteral &headLiteral)
-	{
-		throwErrorUnsupportedHeadLiteral("aggregate", headLiteral);
-	}
-
-	void visit(const Clingo::AST::HeadAggregate &, const Clingo::AST::HeadLiteral &headLiteral)
-	{
-		throwErrorUnsupportedHeadLiteral("head aggregate", headLiteral);
-	}
-
-	void visit(const Clingo::AST::TheoryAtom &, const Clingo::AST::HeadLiteral &headLiteral)
-	{
-		throwErrorUnsupportedHeadLiteral("theory", headLiteral);
-	}
-};
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-}
-
-#endif
diff --git a/include/anthem/LiteralVisitor.h b/include/anthem/LiteralVisitor.h
deleted file mode 100644
index ee631e4..0000000
--- a/include/anthem/LiteralVisitor.h
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef __ANTHEM__LITERAL_VISITOR_H
-#define __ANTHEM__LITERAL_VISITOR_H
-
-#include <anthem/TermVisitor.h>
-#include <anthem/Utils.h>
-
-namespace anthem
-{
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-//
-// LiteralVisitor
-//
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-void throwErrorUnsupportedLiteral(const char *statementType, const Clingo::AST::Literal &literal)
-{
-	const auto errorMessage = std::string("“") + statementType + "” literals currently unsupported";
-
-	throwErrorAtLocation(literal.location, errorMessage.c_str());
-
-	throw std::runtime_error(errorMessage);
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-struct LiteralVisitor
-{
-	void visit(const Clingo::AST::Boolean &boolean, const Clingo::AST::Literal &)
-	{
-		if (boolean.value == true)
-			std::cout << "#true";
-		else
-			std::cout << "#false";
-	}
-
-	void visit(const Clingo::AST::Term &term, const Clingo::AST::Literal &)
-	{
-		term.data.accept(TermVisitor(), term);
-	}
-
-	void visit(const Clingo::AST::Comparison &, const Clingo::AST::Literal &literal)
-	{
-		throwErrorUnsupportedLiteral("comparison", literal);
-	}
-
-	void visit(const Clingo::AST::CSPLiteral &, const Clingo::AST::Literal &literal)
-	{
-		throwErrorUnsupportedLiteral("CSP literal", literal);
-	}
-};
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-}
-
-#endif
diff --git a/include/anthem/TermVisitor.h b/include/anthem/TermVisitor.h
deleted file mode 100644
index 3c96e8f..0000000
--- a/include/anthem/TermVisitor.h
+++ /dev/null
@@ -1,59 +0,0 @@
-#ifndef __ANTHEM__TERM_VISITOR_H
-#define __ANTHEM__TERM_VISITOR_H
-
-#include <anthem/Utils.h>
-
-namespace anthem
-{
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-//
-// TermVisitor
-//
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-struct TermVisitor
-{
-	void visit(const Clingo::Symbol &symbol, const Clingo::AST::Term &)
-	{
-		std::cout << symbol;
-	}
-
-	void visit(const Clingo::AST::Variable &, const Clingo::AST::Term &term)
-	{
-		throwErrorAtLocation(term.location, "“variable” terms currently unsupported");
-	}
-
-	void visit(const Clingo::AST::UnaryOperation &, const Clingo::AST::Term &term)
-	{
-		throwErrorAtLocation(term.location, "“unary operation” terms currently unsupported");
-	}
-
-	void visit(const Clingo::AST::BinaryOperation &, const Clingo::AST::Term &term)
-	{
-		throwErrorAtLocation(term.location, "“binary operation” terms currently unsupported");
-	}
-
-	void visit(const Clingo::AST::Interval &, const Clingo::AST::Term &term)
-	{
-		throwErrorAtLocation(term.location, "“interval” terms currently unsupported");
-	}
-
-	void visit(const Clingo::AST::Function &function, const Clingo::AST::Term &term)
-	{
-		std::cout << "[" << function.name << "]";
-
-		throwErrorAtLocation(term.location, "“function” terms currently unsupported");
-	}
-
-	void visit(const Clingo::AST::Pool &, const Clingo::AST::Term &term)
-	{
-		throwErrorAtLocation(term.location, "“pool” terms currently unsupported");
-	}
-};
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-
-}
-
-#endif