Evaluate the claim: “Five-variable Karnaugh maps are impossible.” Consider standard K-map construction practices.

Introduction / Context:
Karnaugh maps (K-maps) provide a visual method for simplifying Boolean expressions by grouping adjacent 1s (or 0s) according to Gray-coded adjacency. While 4-variable K-maps are commonly shown in textbooks, higher-variable maps also exist and are used in practice for instructional and limited design tasks.

Given Data / Assumptions:

• We consider the existence and usability of a 5-variable map.
• Adjacency follows Gray code ordering.
• Goal is simplification by grouping power-of-two cells.

Concept / Approach:
Five-variable K-maps are typically realized as two linked 4-variable maps (or a 32-cell layout), where the fifth variable toggles between the maps. Groups can wrap across the two maps to preserve adjacency, enabling simplification just as with 3- or 4-variable cases, albeit with more care.

Step-by-Step Solution:

Verification / Alternative check:
Numerous educational resources and CAD tools demonstrate 5-variable K-map groupings. Although 6-variable K-maps are also possible (often as four linked 4-variable maps), the method becomes unwieldy, motivating algorithmic minimization (e.g., Quine–McCluskey) for larger problems.

Why Other Options Are Wrong:

• Correct: Contradicts standard construction using two linked maps.
• Ambiguous as stated: The statement is categorical; there is no ambiguity in “impossible.”
• Cannot be determined: The existence is factual; no extra data is required.

Common Pitfalls:
Assuming K-maps end at 4 variables. Usability decreases with more variables, but possibility remains. Do not confuse “impractical” with “impossible.”

Final Answer:
Incorrect