diff --git a/lessons/1-Intro/README.md b/lessons/1-Intro/README.md
index 5601c824..704dacd9 100644
--- a/lessons/1-Intro/README.md
+++ b/lessons/1-Intro/README.md
@@ -62,7 +62,7 @@ There are two possible approaches to this problem:
 
 Top-down Approach (Symbolic Reasoning) | Bottom-up Approach (Neural Networks)
 ---------------------------------------|-------------------------------------
-A top-down approach models the way a person reasons to solve a problem. It involves extracting **knowledge** from a human being, and representing it in a computer-readable form. We also need to develop a way to model **reasoning** inside a computer. | A bottom-up approach models the structure of a human brain, consisting of huge number of simple units called **neurons**. Each neuron acts like a weighted average of its inputs, and we can train a network of neurons to solve useful problems by providing **training data**.
+A top-down approach models the way a person reasons to solve a problem. It involves extracting **knowledge** from a human being, and representing it in a computer-readable form. We also need to develop a way to model **reasoning** inside a computer. | A bottom-up approach models the structure of a human brain, consisting of a huge number of simple units called **neurons**. Each neuron acts like a weighted average of its inputs, and we can train a network of neurons to solve useful problems by providing **training data**.
 
 There are also some other possible approaches to intelligence: