Idea or concept sketches are an accepted part of technical sketching and often evolve into formal drawings. Evaluate the statement: “Idea or concept sketches are usually not considered to be technical drawings.”

Introduction / Context:
Technical drawing includes a spectrum: from rough ideation sketches to detailed, standardized drawings. The claim that idea sketches are usually not considered technical drawings misrepresents common practice in engineering and design education.

Given Data / Assumptions:

• Concept sketches convey geometry, proportion, layout, and constraints.
• They may include quick dimensions and notes.
• Technical drawing is about communicating design intent graphically.

Concept / Approach:
While a concept sketch may not meet every formal standard (title block, full tolerances), it functions as a technical communication artifact and is commonly taught under “technical sketching”.

Step-by-Step Solution:
1) Define technical drawing broadly as visual communication of engineering information.2) Place concept sketches on the early end of the fidelity spectrum.3) Recognize progressive refinement into detailed drawings as the design matures.4) Therefore, the statement is incorrect.

Verification / Alternative check:
Curricula and textbooks classify “technical sketching” as a foundational drawing skill preceding CAD and detailed drafting.

Why Other Options Are Wrong:
“Correct”: Excludes a widely accepted drawing form.“Only 3D CAD counts as drawing”: Tool-centric and incorrect.“Only inked blueprints count”: Outdated and overly narrow.

Common Pitfalls:
Dismissing early sketches; ignoring their role in design reviews and concept selection.

Final Answer:
Incorrect