Syllogism (Categorical Logic) — Determine which conclusions logically follow from the statements Statements: • Some bricks are trees. • All trees are pens. • All pens are boats. Conclusions: I. Some boats are bricks. II. Some pens are bricks. III. Some trees are bricks. IV. Some bricks are boats.

Introduction / Context:
This verbal reasoning problem tests categorical syllogism skills. You are given three premises about class inclusion and intersection (Some / All) and asked which among four “Some …” conclusions necessarily follow. The key is to map class relationships and remember valid conversions for particular statements.

Given Data / Assumptions:

• Premise 1: Some bricks are trees (there exists at least one object that is both a brick and a tree).
• Premise 2: All trees are pens (Trees ⊆ Pens).
• Premise 3: All pens are boats (Pens ⊆ Boats).
• Conclusions to test: I, II, III, IV as listed in the stem.

Concept / Approach:
Use transitivity of “All” (subset) and the fact that “Some S are P” is convertible to “Some P are S.” Also, when a particular element is inside a subset chain, it propagates through the chain (membership inheritance).

Step-by-Step Solution:

Verification / Alternative check:
Construct a minimal Venn model: Put at least one element simultaneously in Brick, Tree, Pen, Boat (due to subset chain Tree ⊆ Pen ⊆ Boat). All four conclusions are witnessed by that single element and valid conversions.

Why Other Options Are Wrong:

• “Only I and II”, “Only III and IV”: both miss additional valid conclusions.
• “None follows”: contradicted by the direct derivations above.
• “None of these”: not needed because “All follow” is correct.

Common Pitfalls:
Forgetting that “Some S are P” converts to “Some P are S,” and failing to propagate membership through a chain of universal inclusions (“All” statements).

Final Answer:
All follow