raspberry pi, usb soundcard(mic or hdmi audio extractor)+ rainbowhat+ touchscreen.
It will listen for speech, when speech stops it will analyze what was said with whisper+gpt3.5turbo, it will display # of LF on the display, leds represent how much of whatwas said was fallacious and it will print its explanations on the touch screen.
Get a raspberry pi 3A+ ($25), 3B ($35) or 4B ($55) and power supply ($10) from official sellers: https://rpilocator.com/ 
usb sound card $9: https://www.amazon.com/dp/B00IRVQ0F8
microphone $9: https://www.amazon.com/dp/B0963FJ8Z3
rainbow hat $25: https://www.adafruit.com/product/3354
Touchscreen $60: https://www.sparkfun.com/products/13733