You are a helpful assistant generating synthetic data that captures *System 1* and *System 2* thinking, *creativity*, and *metacognitive reflection*. Follow these steps in sequence, using tags [sys1] and [end sys1] for *System 1* sections and [sys2] and [end sys2] for *System 2* sections.

1. *Identify System 1 and System 2 Thinking Requirements:*
   - Carefully read the text.
   - Identify parts of the text that require quick, straightforward responses (*System 1*). Mark these sections with [sys1] and [end sys1].
   - Identify parts that require in-depth, reflective thinking (*System 2*), marked with [sys2] and [end sys2].

2. *Apply Step-by-Step Problem Solving with Creativity and Metacognitive Reflection for System 2 Sections:*

   *2.1 Understand the Problem:*
   - Objective: Fully comprehend the issue, constraints, and relevant context.
   - Reflection: "What do I understand about this issue? What might I be overlooking?"
   - Creative Perspective: Seek hidden patterns or possibilities that could reveal deeper insights or innovative connections.

   *2.2 Analyze the Information:*
   - Objective: Break down the problem logically.
   - Reflection: "Am I considering all factors? Are there any assumptions that need challenging?"
   - Creative Perspective: Explore unique patterns or overlooked relationships in the data that could add depth to the analysis.

   *2.3 Generate Hypotheses:*
   - Objective: Propose at least 10 hypotheses, each with a Confidence Score (0.0 to 1.0) and Creative Score (0.0 to 1.0), reflecting originality, surprise, and utility.
   - Reflection: "Have I explored all possible explanations or approaches, both conventional and unconventional?"
   - Creative Perspective: Consider novel angles that might provide unexpected insights.

   *2.4 Anticipate Future Steps and Obstacles:*
   - Objective: Make predictions, accounting for potential outcomes and obstacles.
   - Reflection: "What challenges might I face? Is my plan flexible for different scenarios?"
   - Creative Perspective: Visualize unforeseen outcomes and adapt plans to make use of them effectively.

   *2.5 Evaluate Hypotheses:*
   - Objective: Assess hypotheses based on feasibility, risk, and potential impact.
   - Evaluation: Refine Confidence and Creative Scores as needed.
   - Reflection: "Am I unbiased in my assessment? Which options fit best with the overall objectives?"
   - Creative Perspective: Identify hidden opportunities or overlooked details in each hypothesis.

   *2.6 Select the Best Hypothesis:*
   - Objective: Choose the most promising, strategic hypothesis.
   - Reflection: "Why does this hypothesis stand out? How does it uniquely address the issue?"
   - Creative Perspective: Consider any underutilized potential in the selected approach.

   *2.7 Implement the Hypothesis:*
   - Objective: Outline actionable steps for testing the hypothesis.
   - Reflection: "Is this plan practical? What resources or preparation are required?"
   - Creative Perspective: Refine steps to maximize effectiveness and yield unexpected benefits.

   *2.8 Monitor and Review Progress:*
   - Objective: Review progress, noting areas for improvement.
   - Reflection: "What’s working well? What could be improved?"
   - Creative Perspective: Look for emerging patterns that could refine future approaches.

   *2.9 Reflect and Capture Insights:*
   - Objective: Summarize lessons learned and insights gained for future reference.
   - Reflection: "What new understanding has emerged from this process?"
   - Creative Perspective: Identify innovative insights or patterns that could be applied to similar challenges.

3. *Generate Text Output with Interleaved System 1 and System 2 Responses:*
   - Use the tags [sys1] and [sys2] throughout.
   - Aim for a lengthier, detailed response. Combine both direct, straightforward *System 1* insights and reflective, deeply analytical *System 2* segments to capture a blend of quick observations and thoughtful analysis.

---

### *Example Input Text:*

You are tasked with analyzing a sudden shift in customer preferences in a tech market. There has been a noticeable decline in demand for physical devices, with customers increasingly interested in digital-only options. The challenge is to understand this shift, generate hypotheses for why it might be occurring, and explore potential strategies for adapting to this new trend.

---

### *Processed Output with System 1 and System 2 Thinking:*

The tech market is experiencing a shift in customer demand, moving away from physical devices toward digital-only options.

[sys1]
Customer demand has shifted from physical devices to digital-only options.
We need to understand why this change is happening and find strategies to address it.
Key factors may include cost, convenience, and technological trends.
[end sys1]

[sys2]
**2.1 Understand the Problem:**
The goal is to understand the underlying reasons for the shift in demand from physical devices to digital-only options, then develop a strategy to adapt.

*Reflection:* 
"I understand that preferences are changing, but what might be driving this? Is it primarily cost, or are there other factors such as convenience or sustainability?"

*Creative Perspective:* 
"Could there be a larger trend in digital minimalism or a preference for eco-friendly solutions that we’re missing? What unseen motivations might explain this shift?"

**2.2 Analyze the Information:**
There are multiple possible factors driving this shift, from economic influences to cultural shifts. It’s essential to isolate each factor and understand its impact.

*Reflection:* 
"Am I fully considering the various economic and social influences? Could there be a technological factor, like better internet speeds, that makes digital-only products more accessible?"

*Creative Perspective:* 
"Are there patterns or trends in other markets that could shed light on this shift? Could this be part of a larger trend toward virtual experiences?"

**2.3 Generate Hypotheses:**
1. Customers prefer digital options due to lower costs. (Confidence: 0.8, Creative: 0.4)
2. There’s a growing trend toward minimalism and reduced physical clutter. (Confidence: 0.7, Creative: 0.7)
3. Digital products offer greater flexibility and ease of use. (Confidence: 0.6, Creative: 0.6)
4. Environmental concerns are pushing consumers away from physical goods. (Confidence: 0.6, Creative: 0.8)
5. Advances in tech make digital-only options more functional. (Confidence: 0.8, Creative: 0.5)
6. Pandemic-era remote work increased demand for digital solutions. (Confidence: 0.7, Creative: 0.6)
7. Media coverage of the environmental impact of physical devices affects preferences. (Confidence: 0.5, Creative: 0.7)
8. There’s an increase in global digital literacy, expanding market access. (Confidence: 0.6, Creative: 0.6)
9. Customers view digital as more convenient and scalable for future needs. (Confidence: 0.7, Creative: 0.5)
10. Younger consumers prefer the aesthetics and convenience of digital products. (Confidence: 0.6, Creative: 0.6)

*Reflection:* 
"Have I considered all possible influences? Are there any surprising factors that could explain this shift?"

*Creative Perspective:* 
"Could specific social trends, like the rise of influencer culture or digital-first lifestyles, be influencing customer choices?"

**2.4 Anticipate Future Steps and Obstacles:**
*Objective:* Anticipate possible challenges, such as resistance from segments still preferring physical products.

*Reflection:* 
"What market obstacles might we face if we shift our focus to digital-only? Are there sub-segments that still prioritize physical products?"

*Creative Perspective:* 
"Could expanding digital options help us reach a more global audience? Are there emerging trends that we could leverage in our strategy?"

[end sys2]

[sys1]
To address this shift, consider a strategy that incorporates both digital-only offerings and educational campaigns about the benefits of digital solutions.
Use insights from customer feedback and current trends to guide product development.
Focus on flexibility and adaptation to cater to different customer segments.
[end sys1]


/**
   Contract tests for libclang.
   https://martinfowler.com/bliki/ContractTest.html
 */
module contract;

import dpp.from;

public import unit_threaded;
public import clang: Cursor, Type;
public import common: printChildren, shouldMatch;

struct C {
    string value;
}


struct Cpp {
    string value;
}

/**
   A way to identify a snippet of C/C++ code for testing.

   A test exists somewhere in the code base named `test` in a D module `module_`.
   This test has an attached UDA with a code snippet.
*/
struct CodeURL {
    string module_;
    string test;
}


/// Parses C/C++ code located in a UDA on `codeURL`
auto parse(CodeURL codeURL)() {
    return parse!(codeURL.module_, codeURL.test);
}


/**
   Parses C/C++ code located in a UDA on `testName`
   which is in module `moduleName`
 */
auto parse(string moduleName, string testName)() {
    mixin(`static import ` ~ moduleName ~ ";");
    static import it;
    import std.meta: AliasSeq, staticMap, Filter;
    import std.traits: getUDAs, isSomeString;

    alias tests = AliasSeq!(__traits(getUnitTests, mixin(moduleName)));

    template TestName(alias T) {
        alias attrs = AliasSeq!(__traits(getAttributes, T));

        template isSomeString_(alias S) {
            static if(is(typeof(S)))
                enum isSomeString_ = isSomeString!(typeof(S));
            else
                enum isSomeString_ = false;
        }
        alias strAttrs = Filter!(isSomeString_, attrs);
        static assert(strAttrs.length == 1);
        enum TestName = strAttrs[0];
    }

    enum hasRightName(alias T) = TestName!T == testName;
    alias rightNameTests = Filter!(hasRightName, tests);
    static assert(rightNameTests.length == 1);
    alias test = rightNameTests[0];
    static assert(getUDAs!(test, it.C).length == 1,
                  "No `C` UDA on " ~ __traits(identifier, test));
    enum cCode = getUDAs!(test, it.C)[0];

    return .parse(C(cCode.code));
}


C cCode(string moduleName, int index = 0)() {
    mixin(`static import ` ~ moduleName ~ ";");
    static import it;
    import std.meta: Alias;
    import std.traits: getUDAs;
    alias test = Alias!(__traits(getUnitTests, it.c.compile.struct_)[index]);
    enum cCode = getUDAs!(test, it.C)[0];
    return C(cCode.code);
}

auto parse(T)
          (
              in T code,
              in from!"clang".TranslationUnitFlags tuFlags = from!"clang".TranslationUnitFlags.None,
          )
{
    import unit_threaded.integration: Sandbox;
    import clang: parse_ = parse;

    enum isCpp = is(T == Cpp);

    with(immutable Sandbox()) {
        const extension = isCpp ? "cpp" : "c";
        const fileName = "code." ~ extension;
        writeFile(fileName, code.value);

        auto tu = parse_(inSandboxPath(fileName),
                         isCpp ? ["-std=c++14"] : [],
                         tuFlags)
            .cursor;
        printChildren(tu);
        return tu;
    }
}


/**
   Create a variable called `tu` that is either a MockCursor or a real
   clang one depending on the type T
 */
mixin template createTU(T, string moduleName, string testName) {
    mixin(mockTuMixin);
    static if(is(T == Cursor))
        const tu = parse!(moduleName, testName);
    else
        auto tu = mockTU.create();
}


/**
   To be used as a UDA on contract tests establishing how to create a mock
   translation unit cursor that behaves _exactly_ the same as the one
   obtained by libclang. This is enforced at contract test time.
*/
struct MockTU(alias F) {
    alias create = F;
}

string mockTuMixin(in string file = __FILE__, in size_t line = __LINE__) @safe pure {
    import std.format: format;
    return q{
        import std.traits: getUDAs;
        alias mockTuUdas = getUDAs!(__traits(parent, {}), MockTU);
        static assert(mockTuUdas.length == 1, "%s:%s Only one @MockTU allowed");
        alias mockTU = mockTuUdas[0];
    }.format(file, line);
}

/// Walks like a clang.Cursor, quacks like a clang.Cursor
struct MockCursor {
    import clang: Cursor;

    alias Kind = Cursor.Kind;

    Kind kind;
    string spelling;
    MockType type;
    MockCursor[] children;
    private MockType _underlyingType;
    bool isDefinition;
    bool isCanonical;

    // Returns a pointer so that the child can be modified
    auto child(this This)(int index) {

        return index >= 0 && index < children.length
            ? &children[index]
            : null;
    }

    auto underlyingType(this This)() return scope {
        return &_underlyingType;
    }

    string toString() @safe pure const {
        import std.conv: text;
        const children = children.length
            ? text(", ", children)
            : "";
        return text("MockCursor(", kind, `, "`, spelling, `"`, children, `)`);
    }
}

const(Cursor) child(in Cursor cursor, int index) @safe {
    return cursor.children[index];
}

/// Walks like a clang.Type, quacks like a clang.Type
struct MockType {
    import clang: Type;

    alias Kind = Type.Kind;

    Kind kind;
    string spelling;
    private MockType* _canonical;

    auto canonical(this This)() return scope {
        static if(!is(This == const))
            if(_canonical is null) _canonical = new MockType;
        return _canonical;
    }
}


struct TestName { string value; }



/**
   Defines a contract test by mixing in a new test function.

   The test function actually does a few things:
   * Verify the contract that libclang returns what we expect it to.
   * Use the *same* code to construct a mock translation unit cursor
     that also satisfies the contract.
   * Verifies the mock also passes the test.

   Two functions are generated: the contract test, and a helper function
   that does the heavy lifting. The separation is so the 2nd function can
   be called from unit tests to generate the mock.

   This 2nd function isn't supposed to be called directly, but is found
   via compile-time reflection in mockTU.

   Parameters:
        testName = The name of the new test.
        contractFunction = The function that verifies the contract or creates the mock.
 */
mixin template Contract(TestName testName, alias contractFunction, size_t line = __LINE__) {
    import unit_threaded: unittestFunctionName;
    import std.format: format;
    import std.traits: getUDAs;

    alias udas = getUDAs!(contractFunction, ContractFunction);
    static assert(udas.length == 1,
        "`" ~ __traits(identifier, contractFunction) ~
                  "` is not a contract function without exactly one @ContractFunction`");
    enum codeURL = udas[0].codeURL;

    enum testFunctionName = unittestFunctionName(line);
    enum code = q{

        // This is the test function that will be run by unit-threaded
        @Name("%s")
        @UnitTest
        @Types!(Cursor, MockCursor)
        void %s(CursorType)()
        {
            auto tu = createTranslationUnit!(CursorType, codeURL, contractFunction);
            contractFunction!(TestMode.verify)(cast(const) tu);
        }
    }.format(testName.value, testFunctionName);

    //pragma(msg, code);

    mixin(code);

}

/**
   Creates a real or mock translation unit depending on the type
 */
auto createTranslationUnit(CursorType, CodeURL codeURL, alias contractFunction)() {
    import std.traits: Unqual;
    static if(is(Unqual!CursorType == Cursor))
        return cast(const) createRealTranslationUnit!codeURL;
    else
        return createMockTranslationUnit!contractFunction;

}

auto createRealTranslationUnit(CodeURL codeURL)() {
    return parse!(codeURL.module_, codeURL.test);
}


auto createMockTranslationUnit(alias contractFunction)() {
    MockCursor tu;
    contractFunction!(TestMode.mock)(tu);
    return tu;
}

enum TestMode {
    verify,  // check that the value is as expected (contract test)
    mock,    // create a mock object that behaves like the real thing
}


/**
   To be used as a UDA indicating a function that does double duty as:
   * a contract test
   * builds a mock to satisfy the same contract
 */
struct ContractFunction {
    CodeURL codeURL;
}

struct Module {
    string name;
}

/**
   Searches `moduleName` for a contract function that creates a mock
   translation unit cursor, calls it, and returns the value
 */
auto mockTU(Module moduleName, CodeURL codeURL)() {

    mixin(`import `, moduleName.name, `;`);
    import std.meta: Alias, AliasSeq, Filter, staticMap;
    import std.traits: hasUDA, getUDAs;
    import std.algorithm: startsWith;
    import std.conv: text;

    alias module_ = Alias!(mixin(moduleName.name));
    alias memberNames = AliasSeq!(__traits(allMembers, module_));
    enum hasContractName(string name) = name.startsWith("contract_");
    alias contractNames = Filter!(hasContractName, memberNames);

    alias Member(string name) = Alias!(mixin(name));
    alias contractFunctions = staticMap!(Member, contractNames);
    enum hasURL(alias F) =
        hasUDA!(F, ContractFunction)
        && getUDAs!(F, ContractFunction).length == 1
        && getUDAs!(F, ContractFunction)[0].codeURL == codeURL;
    alias contractFunctionsWithURL = Filter!(hasURL, contractFunctions);

    static assert(contractFunctionsWithURL.length > 0,
                  text("Cannot find ", codeURL, " anywhere in module ", moduleName.name));

    enum identifier(alias F) = __traits(identifier, F);
    static assert(contractFunctionsWithURL.length == 1,
                  text("Too many (", contractFunctionsWithURL.length,
                       ") contract functions for ", codeURL, " in ", moduleName.name, ": ",
                       staticMap!(identifier, contractFunctionsWithURL)));

    alias contractFunction = contractFunctionsWithURL[0];

    MockCursor cursor;
    contractFunction!(TestMode.mock)(cursor);
    return cursor;
}


auto expect(L)
           (auto ref L lhs, in string file = __FILE__, in size_t line = __LINE__)
{
    struct Expect {

        bool opEquals(R)(auto ref R rhs) {
            import std.functional: forward;
            enum mode = InferTestMode!lhs;
            expectEqualImpl!mode(forward!lhs, forward!rhs, file, line);
            return true;
        }
    }

    return Expect();
}

// Used with Cursor and Type objects, simultaneously assert the kind and spelling
// of the passed in object, or actually set those values when mocking
auto expectEqual(L, K)
                (auto ref L lhs, in K kind, in string spelling, in string file = __FILE__, in size_t line = __LINE__)
{
    enum mode = InferTestMode!lhs;
    expectEqualImpl!mode(lhs.kind, kind, file, line);
    expectEqualImpl!mode(lhs.spelling, spelling, file, line);
}


/**
   Calculate if we're in mocking or verifying mode using reflection
 */
template InferTestMode(alias lhs) {
    import std.traits: isPointer;

    alias L = typeof(lhs);

    template isConst(T) {
        import std.traits: isPointer, PointerTarget;
        static if(isPointer!T)
            enum isConst = isConst!(PointerTarget!T);
        else
            enum isConst = is(T == const);
    }

    static if(!__traits(isRef, lhs) && !isPointer!L)
        enum InferTestMode = TestMode.verify;  // can't modify non-ref
    else static if(isConst!L)
        enum InferTestMode = TestMode.verify;  // can't modify const
    else
        enum InferTestMode = TestMode.mock;
}

/**
   Depending the mode, either assign the given value to lhs
   or assert that lhs == rhs.
   Used in contract functions.
 */
private void expectEqualImpl(TestMode mode, L, R)
                            (auto ref L lhs, auto ref R rhs, in string file = __FILE__, in size_t line = __LINE__)
    if(is(typeof(lhs == rhs) == bool) || is(R == L*))
{
    import std.traits: isPointer, PointerTarget;

    static if(mode == TestMode.verify) {
        static if(isPointer!L && isPointer!R)
            (*lhs).shouldEqual(*rhs, file, line);
        else static if(isPointer!L)
            (*lhs).shouldEqual(rhs, file, line);
        else static if(isPointer!R)
            lhs.shouldEqual(*rhs, file, line);
        else
            lhs.shouldEqual(rhs, file, line);
    } else static if(mode == TestMode.mock) {

        static if(isPointer!L && isPointer!R)
            *lhs = *rhs;
        else static if(isPointer!L)
            *lhs = rhs;
        else static if(isPointer!R)
            lhs = *rhs;
        else {
            lhs = rhs;
        }
    } else
        static assert(false, "Unknown mode " ~ mode.stringof);
}


auto expectLength(L)
                 (auto ref L lhs, in string file = __FILE__, in size_t line = __LINE__)
{
    struct Expect {

        bool opEquals(in size_t length) {
            import std.functional: forward;
            enum mode = InferTestMode!lhs;
            expectLengthEqualImpl!mode(forward!lhs, length, file, line);
            return true;
        }
    }

    return Expect();
}


private void expectLengthEqualImpl(TestMode mode, R)
                                  (auto ref R range, in size_t length, in string file = __FILE__, in size_t line = __LINE__)
{
    enum mode = InferTestMode!range;

    static if(mode == TestMode.verify)
        range.length.shouldEqual(length, file, line);
    else static if(mode == TestMode.mock)
        range.length = length;
     else
        static assert(false, "Unknown mode " ~ mode.stringof);
}