Pseudoscience is anything that purports to be science but has no objective, testable evidence supporting its claims.
Great. Now can we translate that into the real world?
You have to start to explain how scientific method works.
Testing phenomenons in controlled laboratory environments, repeatably and to prove those phenomenons are repeatable.
One of the most funny examples can be demonstrating a gravity.
One christian blogger stated "Scientists do believe in gravity". Thats not correct. Scientist do KNOW about gravity. You can always demonstrate how gravity works by simply let something fall. The thing is, gravity works always, regardless if we believe in it or not.
This is a good to put into contract with statement "without god there are no morals" which is usually used to believe, and stay away from the sin. Christians do here two major claims:
1. If you stop to believe of god, your morals will disappear.
Contrary to that, gravity will not.
2. What slightly undermines its force is that, morals dont vanish regardles you believe in the one true god, or the one true Morty.
Therefore claims made by scientists should be based on demonstrable experiments.
However there is an counterargument you cannot demostrate love to your wife, that its a belief and therefore beliefs are important - particually the most favourite in One True God. Its a fallacy, but i forgot why. Point of this counterargument is that beliefs do not need any proofing.
Boiling it down... Science produces repeatable results in testing. Pseudoscience requires belief (usually into exxagerated interpretation).