3.1 Multi-Source Reasoning

Introduction to Multi-Source Reasoning

Multi-Source Reasoning (MSR) is one of the most distinctive and challenging question formats on the Executive Assessment. These questions present you with two to three tabbed documents—often a combination of memos, emails, policy guidelines, and financial statements—and ask you to synthesize the information to answer a series of questions. The cognitive load is high because the relevant data to solve a single problem is almost always distributed across multiple tabs. You are tested on your ability to quickly map out where information lives, identify how different pieces of data interact, and evaluate complex inferences.

Success on the MSR section requires a structured, repeatable approach. You cannot simply read the tabs as you would a newspaper. Instead, you must treat the tabs as a puzzle where the pieces are scattered, and your first job is simply to inventory the pieces before attempting to build the final picture.

The Anatomy of an MSR Prompt

An MSR prompt typically consists of a split screen. On the left side, you will find the tabbed interface containing the source materials. On the right side, you will find the questions. You will typically see 3 to 6 questions associated with a single set of tabs. Because the upfront reading investment is substantial, maximizing your efficiency when reading the tabs is critical.

The types of documents you might encounter include:

• Corporate Communications: Emails or memos discussing a business problem, proposing a solution, or debating a strategic shift. These often contain qualitative opinions, subjective goals, or business constraints.
• Policy Documents: Rules, regulations, or procedural guidelines that establish boundaries. These are critical because they often act as the strict logical constraints against which you must test specific scenarios.
• Quantitative Data: Financial statements, budget tables, scientific measurements, or demographic statistics. This data is usually presented in a structured format, but the rules for interpreting it will often be hidden in a different tab.

Core Strategy: Passage-Mapping Techniques

The most common mistake candidates make in MSR is attempting to memorize all the details in the tabs or reading them too casually. Under time pressure, you must employ active passage-mapping techniques.

1. Read for Structure, Not Detail: When you open the first tab, determine its primary purpose. Is it outlining a problem? Establishing a rule? Presenting data? Write down a 3-5 word summary of the tab on your scratchpad.
2. Identify the Linkages: As you move to the second and third tabs, actively ask yourself: "How does this relate to the previous tabs?" Look for points of agreement, disagreement, or rule modifications.
3. Note the Variables: If a tab introduces specific metrics (e.g., revenue, employee headcount, regional boundaries), note which tab contains that metric so you can return to it quickly when a question demands it.

For example, if Tab 1 is an email from the CEO demanding a 15% cost reduction, Tab 2 is a list of department budgets, and Tab 3 is an HR policy on severance pay, your map should look like:

• T1: Goal - 15% cut.
• T2: Budget numbers.
• T3: Firing costs/rules.

Do not try to memorize the exact budget for the Marketing department. Just know that budgets live in Tab 2.

Identifying Conflicting Data and Constraints

EA questions frequently exploit the friction between tabs. You must be vigilant for conflicting data or interacting constraints. For instance, Tab 1 might state a general rule: "All regional managers receive a $10,000 bonus if sales exceed $1M." However, Tab 2, a subsequent memo, might introduce an exception: "Due to budget shortfalls, managers in the Northeast region are capped at a $5,000 bonus regardless of sales."

If a question asks about a Northeast manager who sold $1.2M, relying solely on Tab 1 will lead to an incorrect answer. You must synthesize the general rule from Tab 1 with the specific exception from Tab 2. This synthesis is the core skill tested by MSR.

Handling Multiple-Dichotomous Choice Questions

MSR heavily features multiple-dichotomous choice questions. In this format, you are presented with a single prompt and a table containing three independent statements. For each statement, you must select one of two opposing options (e.g., Yes/No, True/False, Supported/Not Supported, Applicable/Not Applicable).

Crucially, you must get all three statements correct to earn any credit for the question; there is no partial credit on the EA. This means you must evaluate inferences and logical consistency with extreme rigor.

When tackling these statements:

• Treat each statement as a separate True/False question. Do not let your answer for Statement 1 influence your analysis of Statement 2 unless they are explicitly logically linked.
• Prove or Disprove: Actively search the tabs for the specific evidence needed to prove or disprove the statement. Do not rely on your memory or "gut feeling."
• Beware of Extreme Language: Statements containing words like "always," "never," "must," or "cannot" require definitive proof from the text. If the text only suggests a possibility or a general trend, an extreme statement is likely False or Not Supported.
• Synthesize: Frequently, determining the truth of a statement requires combining a fact from Tab A with a rule from Tab B.

Worked Example: Synthesizing Information

Imagine the following simplified scenario: Tab 1 (Memo): The company will upgrade its server infrastructure. Any department with more than 50 employees must use the Enterprise Plan. Departments with 50 or fewer employees may use the Basic Plan. Tab 2 (Table):

• Sales Dept: 65 employees.
• Marketing Dept: 40 employees.
• IT Dept: 15 employees. Tab 3 (Email): The IT Dept requires advanced security features only available on the Enterprise Plan, overriding standard headcount rules.

Statement to Evaluate (Yes/No): The Marketing Dept and the IT Dept are both eligible to use the Basic Plan.

Analysis:

• Check Marketing: Tab 2 says 40 employees. Tab 1 rule says 50 or fewer can use Basic. So Marketing is eligible.
• Check IT: Tab 2 says 15 employees. Under Tab 1, they would be eligible. However, Tab 3 explicitly states IT must use the Enterprise Plan, overriding the headcount rule. Therefore, IT is NOT eligible for the Basic Plan.
• Conclusion: Because the statement says BOTH are eligible, the correct answer for this statement is No.

Time Management and Strategic Triage

Because MSR requires significant upfront reading, you must allocate your time wisely. Expect to spend 2-3 minutes reading and mapping the tabs before answering any questions. Once mapped, the individual questions should take 1-1.5 minutes each.

If you find yourself completely lost in the tabs, or if the quantitative data is overwhelmingly complex and you are behind on time, an MSR prompt can be a strategic place to guess and move on. However, because one set of tabs yields multiple questions, a solid upfront investment usually pays off with a quick succession of correct answers. Do not abandon an MSR set unless you are severely constrained by time or genuinely unable to comprehend the core premise of the documents.