According to Garrett, "reasoning is a stepwise thinking with a purpose and goal in mind." Reasoning is a specialized thinking process that enables a person to mentally understand the link between the cause and effect of an event. Reasoning allows someone to solve a problem systematically based on past experiences and present observations. There are two primary types of reasoning.
In inductive reasoning, generalized conclusions are drawn from specific observations. This approach can involve some uncertainty because it is not always straightforward to derive a universal rule from a limited set of specific examples. To minimize ambiguity, it is crucial to go beyond the given information and maintain an impartial perspective.
Key Limitation: Al-Ghazali's burning cotton experiment illustrates the challenge of inductive reasoning. Just because fire has always burned cotton in every observed instance does not logically guarantee it will always do so. The conclusion is probable, not certain — this is the fundamental limitation of inductive reasoning.
Make inductive reasoning on the reactivity of halogens in the periodic table. Halogens→
Deductive reasoning is a research approach that involves testing a hypothesis. It uses a general statement to make specific conclusions. Deductive reasoning is also known as top-down logic. The fundamental principle is that if the initial general statement (premise) is true, then the specific conclusion derived from it must also be true.
Science Titbit Inductive reasoning tells us the possibility of a conclusion, while deductive reasoning refers to the certain outcome of a general statement.
The following examples from chemistry illustrate deductive reasoning:
Chlorine is an element in the halogen group (Group VII). We can apply deductive reasoning to its stability:
Consider the reaction where hydrogen gas reacts with oxygen gas to form water. Deductive reasoning is used to ensure the equation is balanced according to the law of conservation of mass.
We can relate deductive reasoning to the chemical properties of elements in the periodic table. This is often determined by their Electronic Configuration→.
Apply deductive reasoning on the trends in atomic radius along a period in the periodic table.
Reasoning is frequently applied to explain trends like Ionization Energy→ and Electron Affinity.