Ironically, defending arguments using scientific studies and experiments, but not being able to think critically about the methodology used or what the results mean. Too often people will cite scientific literature based off the title and MAYBE skim it. Trying to have a discussion with them will usually result in them calling you anti-science.

A good example is the pseudo-scientific belief common within incel circles that women can store and absorb dna from past sexual partners and that their children can then have more than one genetic father (an excuse to shame sexually active women while fear mongering about cuckoldry). If you track down the source the study actually explicitly explains exactly why this isn’t the case.