I didn't say computer simulations are the same. Do I think they help? Sure. My point was, the testing that used to take months or years to do, now can be done much, much faster. DNA testing wasn't admissible in court until 1986 because it wasn't reliable. Now, we can have testing done in days, or a couple week at most and with extremely high accuracy rates. We have more evidence of what components of vaccines and such will have lasting effects. Again, that isn't to say it's 100% completely foolproof, but to compare testing and research times from 40 years ago and then say that today's stuff isn't as accurate or trustworthy because they didn't take the same amount of time or is also not accurate.