Create a pair of short English sentences that contain four word pairs that have similar unknown meanings.
The sagacious man gave a perspicacious speech on the subject. His erudition was matched only by his acumen. 
Here "sagacious" is similar in meaning to "perspicacious", and "erudition" is similar in meaning to "acumen".
Below is an instruction that describes a task, write a response that appropriately completes the request.

### Instruction:
Create a pair of short English sentences that contain four word pairs that have similar unknown meanings.

### Response:
The sagacious man gave a perspicacious speech on the subject. His erudition was matched only by his acumen. 
Here "sagacious" is similar in meaning to "perspicacious", and "erudition" is similar in meaning to "acumen".