Questions: Mechanical Philosophy and Material Causation

Question 1

Aristotle explains that a stone falls because earth naturally seeks its proper place at the center of the cosmos. A mechanical philosopher would reject this explanation primarily because:

• A. Aristotle lacked the mathematical tools to describe motion quantitatively
• B. The mechanical philosophy excludes final causes — purposes and natural tendencies — from physical explanation
• C. The mechanical philosophy denies that heavy objects fall faster than light ones
• D. Aristotle's explanation cannot be tested experimentally

Answer: (B)

The stone's 'natural tendency' to seek its proper place is a final cause — an explanation in terms of the purpose or goal of a process. The mechanical philosophy eliminated final causes from physics entirely, insisting that physical phenomena be explained only through material particles and efficient causation (forces and collisions). The stone falls not because it 'wants' to reach the center, but because it is pushed by contact forces. Option A is a secondary concern; Descartes and others had sophisticated mathematics. The core philosophical objection is the reliance on teleology — purpose and goal-directedness — in explaining physical events.

Question 2

Robert Boyle demonstrated that combustion and air pressure could be explained mechanically. The philosophical significance of this was:

• A. It proved that chemistry and physics are governed by entirely different laws
• B. It showed that phenomena previously explained by elemental qualities could be reduced to particles interacting by contact forces, extending the mechanical framework beyond pure motion
• C. It confirmed that living organisms obey mechanical laws only up to the cellular level
• D. It validated Aristotle's claim that efficient causation is the most fundamental of the four causes

Answer: (B)

Boyle's contribution was to show that 'messy' chemical phenomena — combustion, air pressure, acid reactions — were not governed by special elemental qualities (fire, air, earth, water) but by the same mechanical principles of particles pushing particles. This extension of the mechanical framework from astronomy and mechanics to chemistry was a major expansion of its explanatory scope. It demonstrated that the 'how' of chemical processes could be given in purely mechanical terms, without appeal to the inherent qualities or purposes of substances.

Question 3

The mechanical philosophy claimed that physical explanations should ultimately appeal to the purpose or goal that natural processes serve.

• T. True
• F. False

Answer: False

This is the exact opposite of the mechanical philosophy's central commitment. The mechanical philosophy eliminated final causes — purposes and goals — from physical explanation. Nature, on this view, has no purposes; it is matter in motion governed by contact forces. Descartes argued that nature is simply extension (matter) and motion: no intentions, no goals, no meanings. The phrase 'the mechanical philosophy' itself implies a machine analogy — and machines don't have goals. Their behavior is fully explained by the arrangement and motion of their parts.

Question 4

By expelling final causes from physics, the mechanical philosophers created a lasting tension between scientific explanation and questions of human meaning, moral purpose, and divine intention.

• T. True
• F. False

Answer: True

This is one of the deepest philosophical consequences of the scientific revolution. A mechanically explained universe operates by impersonal forces with no purposes built in. If nature has no goals, it cannot tell us what we ought to do, or whether human life has cosmic significance, or whether God acts providentially in the world. This tension was felt immediately — Leibniz criticized Newton's gravity as a suspicious return to 'occult' non-mechanical action. The split between the 'how' of science and the 'why' of meaning runs from the seventeenth century through Enlightenment debates about determinism straight into modern philosophy of mind.

Question 5

What is the difference between an 'efficient cause' explanation and a 'final cause' explanation of a physical event, and why did the mechanical philosophers insist that physics use only efficient causes?

Model answer: An efficient cause explains an event by identifying what produced it — the prior state, force, or event that brought it about (a billiard ball moves because another ball struck it). A final cause explains an event by its purpose or goal — the outcome the process is aimed at (a stone falls because it seeks its natural place). The mechanical philosophers insisted on efficient causes only because final causes are not measurable, not mathematically tractable, and not falsifiable — they import intentionality into a domain (inanimate matter) where there is no evidence of intention.

The pragmatic payoff was enormous. Once physicists stopped asking 'why does nature tend toward this?' and started asking 'what forces act here and how?', they could write equations, run experiments, and make precise predictions. Galileo, Descartes, and Newton all benefited from dropping the teleological framework. The cost was philosophical: a mechanical universe is, as the critics noted, mute about values and meaning. Nature describes what happens, not what should happen. This fact-value separation, built into modern science's foundations, is still philosophically unresolved.